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Since there are lots of software projects are found in which you all get tons of chances to exhibit your talent. Furthermore, the solution of the issue is a huge undertaking for an electronics engineer. You may also acquire the necessary information to install the software, along with downloadable ISO images. Such a job is extremely challenging and hard.
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Programming a part of Science Engineering. In designing a 3D image, Matlab computing is extremely efficient it can decrease the opportunity to the tenth of the standard practice.
Often it happens you would love to complete your programming computer on your own. This service is being provided by using the email service to the students of different universities and colleges. Students can send their assignment details and working guidelines through email, similarly, a student can have a direct chat with the team member and instruct him about the assignment. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Toggle Main Navigation. Search MathWorks. Open Mobile Search. Off-Canvas Navigation Menu Toggle. Main Content. In the Command Prompt, enter: ssh-keygen. Tip You can copy a. Tip You can reduce your Git repository size by saving Simulink models without compression. The data is just a click of the mouse away. Data is first viewed in a tree-like interface, and then optionally loaded and visualized in a variety of ways. HDF Explorer features include fast access to data, grid, scalar and vector views.
A user-friendly interface provides control and information about the contents of the files. For ReadDF, the format translation is handled transparently.
Up to five unique lattices may be generated from the file as these files can contain multiple data fields using a single module. A variety of dimensionalities and data types are supported also. Multiple variables may be combined in a single lattice to generate vector data. All three Explorer coordinate systems are supported. Each grid can consist of scalar data from one variable or vector data from multiple variables.
Coordinate information from the file is also included in the grids. Any number of dimensions in any of the Explorer coordinate types are supported. For more information please send email to: pathfinder redrock.
It can display content of netCDF files in tree style control and permits editing its parameters in a standard Windows interface environment. Mathematica is a technical computing environment that provides advanced numerical and symbolic computation and visualization. As of version 6, Mathematica adds classic netCDF data to the many forms of data it can import, export, and visualize.
Noesys includes the visual data analysis tools, Transform, T3D and Plot, for menu driven plotting, rendering, and image analysis. A general description of Origin: Origin includes a suite of features that cater to the needs of scientists and engineers alike. Multi-sheet workbooks, publication-quality graphics, and standardized analysis tools provide a tightly integrated workspace for you to import data, create and annotate graphs, explore and analyze data, and publish your work.
To ensure that Origin meets your data analysis requirements, intuitive tools for advanced statistics, regression, nonlinear curve fitting, signal processing, image processing and peak analysis are built-in. Since any analysis operation can be set to automatically recalculate, you can reuse your projects as templates for future work, thereby simplifying your daily routine.
A general description of OriginPro: OriginPro offers all of the features of Origin plus extended analysis tools for statistics, 3D fitting, image processing and signal processing.
A general description of OriginLab Corporation: "OriginLab Corporation produces professional data analysis and graphing software for scientists and engineers. Our products are designed to be easy-to-use, yet have the power and versatility to provide for the most demanding user. Plot Plus is now available at no charge. It does require licensing on a per computer basis, but the license is at no cost. Surfer is a full-function contouring, gridding and 3D surface mapping visualization software package.
Surfer's sophisticated interpolation engine transforms XYZ data into publication-quality maps. Surfer imports from and exports to a multitude of file formats, including NetCDF grids. It accepts data in a variety of formats, including netCDF, and allows the user to specify how multiple files and variables are mapped into a data source.
This application uses netCDF as a preferred format. Decimate is currently licensed to Cyberware, Inc. Decimate is currently bundled with the scanners, and will soon be available as a commercial product. The key differentiator of Makai Voyager is its level-of-detail LOD technology that enables users to stream big data rapidly over a network or the web. A full-featured day trial version of Makai Voyager is available for download.
It provides the necessary tools to diagnose, validate, and intercompare large observational and global climate model data sets. More information is available at the cdfsync website. File information info, sinfo, diff, Selection selcode, selvar, sellevel, seltimestep, Missing values setctomiss, setmisstoc, setrtomiss Arithmetic add, sub, mul, div, Mathematical functions sqrt, exp, log, sin, cos, Comparison eq, ne, le, lt, ge, gt, Conditions ifthen, ifnotthen, ifthenc, ifnotthenc Field statistics fldsum, fldavg, fldstd, fldmin, fldmax, Vertical statistics vertsum, vertavg, vertstd, vertmin, Time range statistics timavg, yearavg, monavg, dayavg, Field interpolation remapbil, remapcon, remapdis, The EPIC software includes over 50 programs for oceanographic display and analysis, as well as utilities for putting in-situ or observational data on-line with on-the-fly graphics and data download on the WWW.
You can specify how the data should be structured and whether it should undergo a grid transformation before you receive it, even when you know little about the original structure of the stored data e.
The main advantages of using EzGet instead of the lower level cdunif library include: Substantial error trapping capabilities and detailed error messages Versatile capability of conveniently selecting data from specified regions e. The package includes the three utilities nc2text, text2nc, and ncrob for printing selected data from netCDF arrays, copying ASCII data into netCDF arrays, and performing various operations sum, mean, max, min, product, A library fanlib is also included that supports the use of FAN from C programs.
Questions and comments may be sent to Harvey Davies, harvey. It is available by anonymous ftp from abyss. For simple usage, Fimex also comes with the command line program fimex. Gfdnavi Geophysical fluid data navigator Gfdnavi is a web-based tool to archive, share, distribute, analyze, and visualize geophysical fluid data and knowledge. Gliderccope Dr L. GMT GMT Generic Mapping Tools is an open source collection of about 60 tools for manipulating geographic and Cartesian data sets including filtering, trend fitting, gridding, projecting, etc.
Grace Grace is a tool to make two-dimensional plots of scientific data, including 1D netCDF variables. Grace runs on practically any version of Unix. A few features of Grace are: User defined scaling, tick marks, labels, symbols, line styles, colors. Batch mode for unattended plotting. Read and write parameters used during a session.
Support for dynamic module loading. Device-independent Type1 font rastering. Ability to read or write netCDF data. Gri Gri is an extensible plotting language for producing scientific graphs, such as x-y plots, contour plots, and image plots. HDF is an extensible data format for self-describing files. A substantial set of applications and utilities based on HDF is available; these support raster-image manipulation and display and browsing through multidimensional scientific data.
The netCDF calling interface has not changed and netCDF files stored in XDR format are readable, so existing programs and data will still be usable although programs will need to be relinked to the new library.
The other HDF interfaces are currently being modified to allow multi-file access, closer integration with the netCDF interface will probably be delayed until the end of that project. HOPS is implemented in IDL , the widely-used commercial interpreted language, and also in Yorick , a public-domain interpreted language that is freely available from the Lawrence Livermore National Laboratory.
Ingrid Ingrid , by M. To quote the introduction: The Data Catalog is both a catalog and a library of datasets, i. The interface allows you to make plots, tables, and files from any dataset, its subsets, or processed versions thereof.
The Data Viewer in particular demonstrates the power of the Ingrid daemon. IVE currently has the capability to display scalar fields as 2D scalar plots 1D scalar plots vertical soundings a single point value vector fields as 2D vector plots IVE lets you overlay plots, loop plots, and control a wide variety of display parameters. Kst 2D plotting tool Kst is an open-source, cross-platform 2D plotting tool focused on performance and ease of use. Kst is characterized by the following features: Outstanding performance: curves with millions of points are no problem Plotting of live streams Out-of-the box support for a variety of formats currently ASCII, netCDF, dirfile, Qimage-supported types, fits images User-friendly with a modern and consistent user interface A set of unique tools to boost efficiency, including a data import wizard, capacity to edit multiple objects at once or the "Change Data File" tool to compare multiple experiments easily An active community Easily expandable for new data formats or data analysis algorithms thanks to a plugin-based architecture Available on Windows, Linux, and Mac OSX Labview interface A netCDF Labview interface, implemented in the Labview programming language is available.
MeteoExplorer MeteoExplorer , developed by Lianqing Yu at China Meteorological Administration, is a cross-platform software application for analyzing and rendering atmospheric science and geoscience data. Features include: Designed to work with arbitrary netCDF files. Provides a "tree" view of the netCDF file. Handles character variables. Handles dimensions without an associated variable. Uses sgt graphics to perform 1 and 2 dimensional cuts through data.
Save to file single variable as a "cdl" text file. Currently uses Java 2 and Swing. NCO NCO netCDF operators is a package of command line operators that work on generic netCDF or HDF4 files: ncap2 - arithmetic processor ncatted - attribute editor ncbo - binary operator ncdiff - differencer ncea - ensemble averager ncecat - ensemble concatenator ncflint - file interpolator ncks - kitchen sink extract, cut, paste, print data ncpdq - permute dimensions quickly ncra - running averager ncrcat - record concatenator ncrename - renamer ncwa - weighted averager All operators may now be OPeNDAP clients.
For more information, contact the author, Charlie Zender. Typically you would use ncview to get a quick and easy, push-button look at your netCDF files. You can view simple movies of the data, view along various dimensions, take a look at the actual data values, change color maps, invert the data, etc. NE gmail. The currently packaged tools are: a couple of simple shell wrappers over the respective NetCDF functions ncattget and ncattput ; a more sophisticated ncget tool.
It employs a data-flow driven client-server execution model and provides a graphical program editor that allows the user to create a visualization using a point and click interface. Features include: Slice and plot geo-gridded latitude-longitude, latitude-vertical, longitude-vertical, or time-latitude arrays from larger multidimensional variables.
Two arrays may be combined in one plot by differencing, summing, or averaging. The logical vectors created from logical and relational operations can be used to reference subarrays. Suppose X is an ordinary matrix and L is a matrix of the same size that is the result of some logical operation.
Then X L specifies the elements of X where the elements of L are nonzero. I've discovered to my horror that structs take up an obscene amount of overhead I'm running version 5. I have this stored in a 1 x data structure, and when I issue the whos command, it tells me that the data now takes up 27,, bytes! Each array has some overhead, like data type, array sizes, etc. In your second implementation index using data. Note that in your data, for each observation, you have 13 arrays with one value.
I don't know how large the matrix header exactly is, but it is a waste putting only a single value in it! I think Cris has hit it exactly. Each one of these matrices adds an additional bytes, for This still comes up a little short of the amount reported, but it is fairly close.
It is much more efficient, both for storage and computation, to use a struct of arrays rather than an array of structs. The debug memory manager cannot catch your code the instant it writes out of bounds tools like Purify can do this but the performance hit they induce is quite painful. What it will catch is that in general, when you write outside of one memory block you end up writing into another, corrupting it or in the case of the debug memory manager hopefully corrupting only a guard band.
When you later free the memory, we can tell you that you walked off the end of the block and corrupted the guard band. In many programming languages, boolean operators like AND and OR will stop evaluating as soon as the result is known. For instance,. In all other contexts, all parts of the conditional are evaluated. Why can't I create this MB matrix?
First of all, issue the command "memory" in the command window to see how much memory is available on your computer.
It should return something like this:. Remember that double precision floats take up 8 bytes. So a million element vector takes up 8Mbytes. Be sure you're estimating properly. Many operations need to create duplicate matrices. In order to work around this issue, one solution is to pre-allocate memory by creating an initial matrix of zeros with the final size of the matrix being populated in the FOR loop.
You should read the following Mathworks article: Technical Solution for a more complete discussion of this problem. This allows one replace any or all of the parameters with dynamically generated strings.
If you are attempting to use pass-by-reference to modify the input argument passed into a function, the answer to the question depends on whether the input is a handle object or a value object. By default, objects including matrices, arrays, etc.
Handle objects do exhibit reference behavior when passed as function arguments; value objects do not. When you pass a handle object to a function, MATLAB still copies the value of the argument to the parameter variable in the function with one bit of subtlety; see below.
However, all copies of a handle object refer to the same underlying object. If a function modifies a handle object passed as an input argument, the modification affects the object referenced by both the original and copied handles. In this case, the function does not need to return the result to be reassigned. If instead you are attempting to use pass-by-reference to avoid unnecessary copying of data into the workspace of the function you're calling, you should be aware that MATLAB uses a system commonly called "copy-on-write" to avoid making a copy of the input argument inside the function workspace until or unless you modify the input argument.
For instance, in this code:. If on the other hand, you called this function:. The term "function functions" refers to functions in MATLAB and the toolboxes that accept a function usually a function handle and evaluate that function repeatedly during the course of their work. Some examples of "function functions" are:. There are several documents on The MathWorks support website that shows examples of how to pass additional parameters to the functions used by the "function functions".
When a function is cleared from memory using the CLEAR function, breakpoints in that file are also cleared. If you want to have your program stop execution and enter debug mode regardless of whether or not you have cleared it, insert a call to the KEYBOARD function into the code at the location where you want to enter debug mode.
Since EVAL is so powerful, it is easy to misuse the function. In a way, the EVAL function is a lot like global variables; both are tools that are so easy to use that it might be easier to use them rather than to search for a more elegant, safer, and appropriate solution.
EVAL can be used to alter arbitrary variables. In addition, two related functions, evalin and assignin, can be used to alter variables in different function workspaces. These functions can create bugs which are difficult to reproduce and nearly impossible to eliminate. Further explanation, and The Mathworks official warning against using eval, can be found in Mathworks Tech Note It may not be there to read in or may not be written out to the folder that you expected.
If another function call used the cd function to change the current folder, then you would be looking to that folder when you tried to read in a file or write out a file. If you thought that you were looking at a different folder, then you'll get a "file not found" error upon trying to read in a file, or else not find the file in that folder that you thought you wrote out to.
It would be best if any code that used cd saved and restored the original folder:. It's much, much better to not use cd and instead create the full-blown explicit filename with functions such as sprintf , fileparts , and fullfile.
Because if you have the full path name of the file, you'll know for certain where it will get saved to or read from. See the following code for guidance:.
Unlike custom functions that you write, the callback functions take the predetermined input variables hObject, eventdata, handles so it's not clear how you can pass in other variables that you need to. There are several techniques you can use to share data between callback functions in your GUI.
Functions that do not have the "global myVariable" line in them will not be able to see the variable. The "myVariable" variable will not be seen in the "base" workspace - it will be seen only inside functions with the "global myVariable" declaration in them.
Sharing between multiple GUIs. If the "main" GUI calls other GUIs, then the best way to do it is by passing variables in via the input argument list, and accepting output variables via the output argument list. So someplace in GUI1 like the callback function of the "Go! Once they are in your opening function, then they can be shared amongst the other functions in the GUI with the methods mentioned earlier in this section.
Official Documentation. The documentation contains instructions for using these techniques to share data between callbacks in these Mathworks web pages:. To shade between an upper and lower curve, you can use the patch function. Here is an example It can be extended to handle ellipses by putting in factors inside the sqrt in the obvious places. If you want, this circle mask can be used to assign image values either inside or outside the circle to a new gray level:.
If you would like the circle to be only a single pixel wide circumference in the digital image, rather than a solid disc, then you can use this code:. Newer versions of the Image Processing Toolbox have the viscircles function for plotting multiple circles simultaneously in the overlay above the digital image. Or, if you want a list of x and y coordinates of the perimeter of the circle, or of an arc, you can do this:.
Note that it will be a circle according to the tick marks on the axes, but whether it appears perfectly circular on your computer monitor depends on your video adapter settings, and whether you use, or don't use, the 'square' and 'equal' options for the axis command. The above code can also be used to create an arc - a portion of a circle. Just change the line that assigns theta to start and stop at the desired angles of the arc.
If you want this to be in the overlay of an existing plot or image, issue the "hold on" command prior to issuing the rectangle command, or else the circle will destroy the existing plot or image. The use of meshgrid or ndgrid can be easily extended to 3D to create a logical mask for a sphere.
Creating an arc is very similar to creating a circle. Simply specify a starting and ending angle for theta. The code is very similar to the code to create a circle from above - just specify an inner and outer radius. The code is very similar to the code to create a circle from above - just specify an inner and outer angle, and an inner and outer radius that changes for each angle.
The ending angle can be as high as you want. The larger it is, the more times the spiral will wrap around the center. To create a set of x,y coordinates within the perimeter of a solid circle a disc , you can use code like this from Roger Stafford in his Answers posting :. To create a set of x, y, z coordinates uniformly and randomly distributed over the surface of a hollow sphere a round shell , you can use code like this from Roger Stafford in his Answers Forum posting [4].
The ticklabel gets its properties from the axis to which it is attached. So set gca, 'fontsize', 14 should do the trick. Type get gca to see what else you can set. Not directly You can play games with placing text by hand. Need friends can refer to it! Welcome to continue to pay attention to other software tutorials in developpaer! Ruby is an interpreted, object-oriented, dynamically typed language.
With the emergence of rails framework, ruby became a blockbuster around , and also guided people to regain the fun of programming.
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