# Sarah Wait Zaranek

### MathWorks

Professional Interests: parallel computing, geophysics

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**Content Feed**

Array manipulation ... a better way?

You can do this with logical indexing (and not a for-loop) q = zeros(length(p(:,1)),1); Find where the first column is e...

ungefär 10 år ago | 0

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load several (one after another ) .mat Files via a For-Loop Job

Unless I am missing something, I think the easiest thing would be to do a nested for loop. for ii = 1: Number load(['co...

ungefär 10 år ago | 6

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How to fit histogram data with normfit using signed X-axis ?

Probably the easiest way to handle this, if you like what the distribution fitting tool is doing, is to autogenerate code from ...

ungefär 10 år ago | 0

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Reproducing the "Evaluate" function from "basic fitting" GUI directly in code

You can use the polyfit function to fit your data programatically. You can then use polyval to evaluate the polynomial at a giv...

ungefär 10 år ago | 0

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Question regarding the Spredsheet link EX tool

These sections in the documentation should walk you through the basics of using Spreadsheet Link EX. http://www.mathworks.com...

ungefär 10 år ago | 0

Error running parallel simulations

It looks like your mex file is still being used in MATLAB memory. You can try to see if clearing mex files will help, clea...

ungefär 10 år ago | 0

sharing matrix in parfor

There is no way to do shared memory automatically in a parfor loop. However, depending on where the data is located - there may...

mer än 10 år ago | 1

Sscanf /sprintf usage

I think this is your issue -- From doc for sscan - "Format specifiers for the reading functions sscanf and fscanf differ f...

nästan 11 år ago | 0

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How to Save Matrices to excel multiple times with incremental excel name to avoid overwrite

The easier way to to construct a new filename within the loop by converting the index to a string and adding it the original nam...

nästan 11 år ago | 2

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converting .mat to .dat file

This should do it. Note: I made a sample mat-file with x,y,a as my variables. load test.mat dlmwrite('test.dat',[x y a]...

nästan 11 år ago | 0

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Randomly Choose number from a matrix of several numbers?

Instead of starting with your code - I will give an example of how I would do it. Hopefully this can see how you implement it i...

ungefär 11 år ago | 0

Controlling Dll files from Matlab

First step is to see if you can use loadlibrary interface in MATLAB. See this section of the documentation on how to call C ...

ungefär 11 år ago | 0

Loops are slow inside spmd blocks!!

Looks like loops inside parfor/spmd with tons of iterations are not getting all the benefit from JIT (Just-in-Time interpreter/c...

ungefär 11 år ago | 0

Writing a cell array to excel but skipping certain values

I think it is clear what you want to do- I don't have MATLAB open, so forgive minor syntax issues. 1. Step one extract the ...

ungefär 11 år ago | 1

export to excel

This should work out for you. Reshape the array so it is an nx*ny by 4 and then use the xlswrite command. A = rand(18,30...

ungefär 11 år ago | 0

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CPU ID and EXE

You can run any command to the operating system via the bang (!) command, something like this (for a Windows machine) will give ...

ungefär 11 år ago | 0

How to autoload a custom function in cftools

I believe what you want to do is to highlight the data you don't want to fit using the "outlier" tool. <http://www.mathwork...

mer än 11 år ago | 0

How to autoload a custom function in cftools

A couple of options for you. 1. You can autogenerate the code to do the fit from cftool. Then you can repeat the analysis wit...

mer än 11 år ago | 0

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Changing a single element in sparse matrices

In general, it is useful to define the values and locations of the non-zero entries of your sparse matrices - and then only crea...

mer än 11 år ago | 0

Semilogy Plot not showing minor tick marks

The X Minor ticks are off by default. This should turn them back on. ax = gca; % grabs current axis set(ax,'XMinorTi...

mer än 11 år ago | 0

Running MATLAB from Excel - Matlab Builder Ex or Matlab Spredsheet link EX?

It basically breaks down to if you want the end user who is running the model within Excel to have MATLAB or not. Spreadshe...

mer än 11 år ago | 1

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Parallel for loop: Using broadcasting array variable values as indexes

For parfor loops, when you index into a sliced variables, restrictions are placed on the first-level variable indices. This allo...

mer än 11 år ago | 2

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memmapfile in parfor loops

You should be able to use memmapfile in a parfor loop. The trick is to pass m into a function within the parfor loop. You can g...

mer än 11 år ago | 3

plot integral

This can be done using cumtrapz -- Doc here: <http://www.mathworks.com/help/releases/R2011a/techdoc/ref/cumtrapz.html> ...

nästan 12 år ago | 4

How to brush data automatically?

Only certain plots can be brushed. The doc has list here of what you can and can't brush: <http://www.mathworks.com/help/release...

nästan 12 år ago | 1

how to open 3D image from a series of 2D image?

This demo using MRI data should help you get started: <http://www.mathworks.com/help/releases/R2011a/techdoc/visualize/f5-329...

nästan 12 år ago | 2

parallel computing with scheduler Comsol-Matlab

COMSOL helped me with a similar issue about a year ago. Their answer is below. I would encourage you to contact them. They were...

nästan 12 år ago | 2

several slices of a 2D-image interpolate to 3D

This demo is probably a good first start for you. Displaying MRI Data: <http://www.mathworks.com/help/techdoc/visualize/...

nästan 12 år ago | 0

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...

nästan 12 år 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 ...

nästan 12 år ago | 0