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receiving a sparse matrix
If I understand you correctly, what you want to do is take your cell array (1 x 40) - and for each column of the cell array maps...

13 years ago | 0

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bar3 color
I believe this will work for you. Basically I am resetting each set of bars colormap by changing the CData of the patches that ...

13 years ago | 0

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Argument Question?
I think this is what they meant - In the function file: function outputVar = myfunction(inputVar) % write the rest of t...

13 years ago | 0

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How to recover the Data (fields) from the Structure
allstats = [stat.sfit] should save all the outputs in an array for you. diff(yfit) should give you the interval...

13 years ago | 0

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starting, stopping and waitFor in a timer
I am not exactly sure what you want - but I think this is close. 1. Creating a timer that blocks the MATLAB command line for ...

13 years ago | 0

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Way to get handle to just brushed object?
Not sure if this is what you are doing or not, but this seems to work for me. It works very nicely on lines (at least in my limi...

13 years ago | 0

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How do I generate a matrix based on a formula?
You can use backslash to solve this: n = 9; % Fill in the correct terms for your non-zeros values. A =diag(-4*ones(...

13 years ago | 0

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Answered
To generate vertice mesh from a series of contours
I believe this should work for you. % Generating some contour data x = rand(100,1)*4-2; y = rand(100,1)*4-2; z = ...

13 years ago | 0

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how to plot axes onto an image
This should help you to start with the problem. Everything is centered at the origin (0,0) but that could be adjusted by changin...

13 years ago | 2

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Colorbar/varycolor ticks
I believe you don't want to change the ticks but the limits of the axis that contains your colorbar: h = colorbar; set(h,'Ylim'...

13 years ago | 1

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GPUArray ANDs and ORs
Have you tried the option of creating your own kernal from a MATLAB function? I wrote a brief code tidbit below. Note: I hav...

13 years ago | 0

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Answered
Mysterious behavior in parfor (I know, sounds basic, but...)
There were a couple questions in your quesiton, so let me go through them individually. 1. numlabs and labindex alway return...

13 years ago | 1

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Answered
I want to store a big matrix (a 720GB variable )
I can think of two ways to do this: 1. If you have a sparse matrix, then I would use the sparse data type in MATLAB and probab...

13 years ago | 1

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Error Message: "Error: Function definitions are not permitted in this context." How do I fix this?
When you define a function in a file - you use the function [R] = HydraulicRadius(W) when you call it to use it, you do ...

13 years ago | 0

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Multithreading does not work for external programs called by the 'system' command
I have seen this before. I think this is how we resolved it. Basically, MATLAB and Windows may use different environment va...

13 years ago | 1

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Rescaling colormap/colorbar
If you get a handle to the colorbar, then you can set the y limits of the colorbar axis. This will allow you to show only the co...

13 years ago | 1

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custom stopping criteria when using fmincon
You can set the stop flag as part of the output function. It is described in the documentation here: <http://www.mathworks.com...

13 years ago | 0

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Apply quad (or dblquad) on a series of integrals
The only thing I could think of was to use arrayfun. I don't think it will be much faster you for (at least in my tests) but it...

13 years ago | 0

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Loading files
I find this chart helpful. It lists the file types that core MATLAB can read/write and what functions to use. <http://www.ma...

13 years ago | 0

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Programming
If I understood your question correctly, I would propose the following: First, find the places where 1 changes to 10 or 10 t...

13 years ago | 0

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point values from the curve
If you want to get points from a spline curve - I would suggest using ppval x = 1:10; y = cos(x); pp = spline(x,y); ...

13 years ago | 0

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Error when using fprintf to show a string
The output when you call XLSREAD with two output variables returns the second output is the text fields in cell array. This mean...

13 years ago | 0

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Help with Varargin
I would suggest the following. This way, the input values are reflected. Hardwire the inputs you definitely want, and use vara...

13 years ago | 0

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VideoWriter Help
You can set the rectangular frame you want to capture. currFrame = getframe(gca,[-10 -10 400 400]); The value of cdata i...

13 years ago | 1

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Plotting temperature vs time using two equations and ode45 function
You can use a persistent variable (e.g. switchVar and initially set it to zero) in your deltaT function persistent swi...

13 years ago | 0

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curve fitting toolbox
The curvefit object you get out of curvefitting tool will allow you to take a derivative at a point using the differentiate meth...

13 years ago | 1

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process image and plot graph
Jiro Doke has a tool (GRABIT) on File Exchange that allows you to pick points along the curve of a jpeg and then import them to ...

13 years ago | 1

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Extracting white blood cell from cell samples
This should be enough to get you started. I filtered the purple cells by looking at the blue color plane. I then removed any n...

13 years ago | 0

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two point boundary vale problem
The function bvp4c should be able to get you started. There are some nice examples in the documentation for bvp4c that shoul...

13 years ago | 0

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Matlab with dual core uses only 50% cpu (R2010b, Intel Core 2 duo T9300)
It depends which version of MATLAB you are using. MATLAB started including multithreaded functions in R2007a. I believe multith...

13 years ago | 3

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