Answered
Error in loading a very large matlab file
Hi Christina, does this .mat file contains several variables or one large matrix? In the latter case, I guess, you will have ...

13 years ago | 2

Answered
How to run an m-file in MATLAB from Visual Studio in C code
Hi Vlad, the command engEvalString evaluates a string in the engine. This string may simply be the name of a function or scri...

13 years ago | 1

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Answered
Is there any way to selectively remove lines from a plot?
Hi, the easiest way is to store the handles you plot, e.g. hPlot = zeros(100, 1); for i=1:100 hPlot(i) = plot(so...

13 years ago | 1

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Answered
How to look up corresponding 2D matrix from a table of 8 columns?
Hi, in this case probably this is easiest done by hand: columns = 0:5:35; thick = 7; % find the 2 indices where 7 ...

13 years ago | 0

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How can I plot 3D graph provided that I have x,y,z value
Hi, if the data points x,y are irregular (i.e., not on some grid), just use plot3 to plot them. For functions like mesh and s...

13 years ago | 0

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Answered
array of objects
Hi, something like this? classdef someClass properties name value end methods ...

13 years ago | 3

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Answered
1/X & X^-1 are they the same?
Hi Raymond, if it's scalars take Walter's advice on ./ and .^ (should be no measurable difference between those). If X is a m...

13 years ago | 0

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how to generate c code without using tool through embedded coder.
You want to generate code without code generation tools? I guess this is equivalent to writing the code by hand...?

13 years ago | 0

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Answered
fmincon and constrains
Hi, if you know that x(1)=a why don't you take x(1) out of the optimization problem? But if you want to keep it, just let lb(...

13 years ago | 0

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Answered
Matlab mex memory handling - same input different result
Hi, looking on the code I don't see a reason why consecutive calls don't give the same answer. So it looks as if the answer t...

13 years ago | 0

Answered
Turning numbers into letters based on alphabetical order
Hi Brendan, something like this: n = 7; char('A'+(n-1)) What I forgot: you might also think about taking n1 = ...

13 years ago | 1

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Answered
Using NET assembly from within MATLAB
Hi, I'm not sure, but as a first simple test to rule this out, try to send a 1D array: you are sending a 2D array to a 1D (Sy...

13 years ago | 0

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Answered
Sort matrix A from least to greatest and have corresponding entries in matrix B move to equal positions
Hi, there are two ways: either combine them into one matrix and use sortrows, the other is to sort A and call sort with two o...

13 years ago | 0

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Answered
Same functionality as Excel Solver to set objective to a value
Hi Peter, to optimize a variable to be of value XTarget, you need to minimize the function abs(x - XTarget) If you do...

13 years ago | 0

Answered
How can I sort(delete) contents in listbox?
Hi Haksun, in your pushbutton5_Callback you need to define newList, e.g. newList = get(handles.listbox1, 'string'); b...

13 years ago | 0

Answered
Using string saved variables for calculations
Hi, generally speaking you can do the same as before: TotalZ = 0; for v=1:18 TotalZ = TotalZ + eval(['Z_' num2str(...

13 years ago | 0

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Answered
repeat a matrix as digonal element in a new matrix?
Hi, I usually use blkdiag: A = rand(2,3); ACell = repmat({A}, 1, 10); BigA = blkdiag(ACell{:}); Titus

13 years ago | 9

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Answered
Out of memory issue in Matlab 7.6 (R2008a)
Hi, this is my guess (!): the values in B have an influence on the stiffness of the system. Does the ode45 makes very small t...

13 years ago | 0

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How to save a double number to integer to a .txt file?
Hi Susan, you don't have to convert to int. Just round and use save with "-ascii". Titus

13 years ago | 0

Answered
Binary to Signed decimal in MATLAB
Hi, then I guess the other way round should do the trick as well: typecast(uint16(bin2dec('1000000000000000')), 'int16')...

13 years ago | 0

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Matlab compiled dll from m-file not linking in c/c++ application
Hi, just a comment regarding point 1): entering the following in R2011b to confirm: [x,y]=mcrversion x = 7 y = ...

13 years ago | 0

Answered
fmincon function ( constrained nonlinear multi-variable optimization)
Hi Hadi, you will need to compute them again in the mycon function, i.e., function [c,ceq]=mycon(x) c1 = fourier(x); ...

13 years ago | 0

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Question of mean
Hi, 0.86 is not exactly representable in computers double precision representation: fprintf('%.20f\n', 0.86) 0.85999999...

13 years ago | 0

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Call a MEX function from Simulink
Hi Martijn, for the xPC Target you will need to have the source code of IPOPT solver available. You can write your S-function...

13 years ago | 0

Answered
Issue with mean function
You will need to do exactly what you are describing: taking for each element the mean of the surrounding elements. What you did ...

13 years ago | 0

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least square method
Hi Tiara, "fit" may be next to everything. If it is a linear fit, just use polyfit, same of course for polynomial fit. Everyt...

13 years ago | 0

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Answered
Input argument "ke" is undefined.
Hi Rita, did you put in your S-function block three parameters to be passed as ke, kec and ku? Titus

13 years ago | 0

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Answered
Old class definitions in MATLAB2012
Hi Philipp, what do you mean by "easily browse"? Do you mean taking a look at the properties? You might convert to a struc...

14 years ago | 0

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Answered
nonlcon in fmincon not satisfying my constraints :( getting crazy.
Hi, fmincon will try to satisfy the relation c<0. To this end you need to compute c, but you give the relation. So: you need ...

14 years ago | 1

Answered
How to make a small change to a big text file efficiently
Hi, if it is the same length, I would suggest to use memmapfile: open the file using memmapfile. Use e.g. strfind to find whe...

14 years ago | 0