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Awarded to Douglas Brenner on 20 Jul 2017
Feeds
Matlab crashes but Octave doesn't
Give that man a cigar and thank you very much. pinv(A)*b work as I suspect doing the LU decomposition manually would.
plus de 5 ans il y a | 0
Question
Matlab crashes but Octave doesn't
The program below runs in Octave but crashes Matlab 2014. Mathworks won't help because my contract has run out. Any ideas would ...
plus de 5 ans il y a | 3 réponses | 0
3
réponsesQuestion
creating a vector where each element needs to be calculated before hand
Can I creat Z in a single statement which doesn't require explicit calculation of each element or should I just use a loop? Z =...
plus de 5 ans il y a | 1 réponse | 0
1
réponseQuestion
Creating a matrix one row at a time
In each iteration of a loop I create a row vector Y = [1,2,3,4,5]; then I want to add the Y's to a matrix one line at a time;...
plus de 5 ans il y a | 2 réponses | 0
2
réponseshelp with fitlm (least squares fit)
I could try a Gaussian fit. That would work for me. Do you have an example for that? Thanks.
plus de 5 ans il y a | 0
help with fitlm (least squares fit)
Your demo crashed it as well.
plus de 5 ans il y a | 0
| A accepté
help with fitlm (least squares fit)
X = [1,2,3,4,5] Y = [1,5,6,4,2] yFit = polyfit(X,Y, 2) Matlab itself crashed.
plus de 5 ans il y a | 0
Question
help with fitlm (least squares fit)
I don't understand how to use fitlm if indeed that's the right function to use. I want to fit 5 sets of data to the function y ...
plus de 5 ans il y a | 3 réponses | 0
3
réponsesWhy would circshift stop working.
I had been transposing matrics and released this morning as I was waking that this must have been the problem. Thanks.
plus de 5 ans il y a | 0
Question
Why would circshift stop working.
There is no evidence that circshift is working. The two plots are the same whereas yesterday a clear shift in the plots can be s...
plus de 5 ans il y a | 3 réponses | 0
3
réponsesmatrix multiplication dimension issues
Found the answer. n is not the number of points in a spectrum but the number of spectra. Thanks for trying
plus de 5 ans il y a | 0
matrix multiplication dimension issues
The basic science is to take two spectra and perform a 2d cross correlation resulting in a real and a complex matrix. They shoul...
plus de 5 ans il y a | 0
Question
matrix multiplication dimension issues
I have an article which I'm trying to follow. It calculates two matricies that I called synch and async. I read two files into...
plus de 5 ans il y a | 3 réponses | 0
3
réponsesQuestion
Replacing for loops with matrix math.
How can I simplify this code. I.e remove the loops and replace them with matrix math. for i=1:3 for j = i:num_pts - ...
plus de 5 ans il y a | 1 réponse | 0
1
réponseQuestion
Getting off diagonals after calculating a correlation matrix
The code below gives the first off diagonals of the correlation computation in line 6. How do I get the others? testm1 = [1...
plus de 5 ans il y a | 1 réponse | 0
0
réponsereducing number of operations in matrix multiplication
Clearly but that was the suggested solution. Trying for i=1:2 diags1{i} = testm(i+1:num_pts-i-1 ,2).*testm(1:num_pts-i-1,2...
plus de 5 ans il y a | 0
reducing number of operations in matrix multiplication
testm = [1,2,3,4,5;2,4,5,7,10] num_pts = 5; testm = transpose(testm) corr = testm(:,2)*testm(:,2)' diag(...
plus de 5 ans il y a | 0
Question
reducing number of operations in matrix multiplication
I want to perform the follow operation: synch = spect1(1:num_pts ,2)*spect2(1:num_pts,2)'; The problem is that num_pts > 300,0...
plus de 5 ans il y a | 2 réponses | 0
2
réponsesQuestion
I want to do a least squares fit to the values around a matrix diagonal including the diagonal itself.
Suggestions?
plus de 5 ans il y a | 1 réponse | 0
1
réponseQuestion
Why does this loops produce a matrix?
code waves = [393.029, 414.386, 427.176, 516.748, 526.953, 640.000]; l = length(waves); for i = 1:l L = wave...
plus de 5 ans il y a | 1 réponse | 0
1
réponsedimension error with * operator
The paper from which I got the code uses * and that works in this line: synch = C1(:)*C1(:)'/(delta-2). Not only do I not get ...
plus de 5 ans il y a | 0
Question
dimension error with * operator
This line of code: asynch = C1(:)*N(:)*C(:)'/(delta-2) throws an error: Error using * Inner matrix dimensions must agree. Th...
plus de 5 ans il y a | 3 réponses | 0
3
réponseserror trying to run xcorr2.
This is the error: Cell contents reference from a non-cell array object. Error in cell2mat (line 42) But if I try a different...
plus de 5 ans il y a | 0
Question
error trying to run xcorr2.
This is my code D1 = cell2mat(data1{2}); %D1 and D2 are 1x3 cells of doubles D2 = cell2mat(data2{2}); c = xcorr2(D1,D2); It ...
plus de 5 ans il y a | 1 réponse | 0
1
réponseGetting non-existent pixel values
Didn't work Index exceeds matrix dimensions. Error in stddev (line 51) greenChannel = b(:, :, 2); Is there a green pla...
plus de 7 ans il y a | 0
Question
Getting non-existent pixel values
After the following code, an image is displayed. It is black, white and red. However, if I use hpimpixelinfo(2) on the image I ...
plus de 7 ans il y a | 2 réponses | 0
2
réponsesQuestion
image processing algorithm for filling
I am going to try but in the meantime if anybody wants to help ... I have a 2-D image in black, white and red. Going across e...
plus de 7 ans il y a | 1 réponse | 0
0
réponseQuestion
using greythresh and im2bw
Figure 1 is great but BW is all black. Thoughts? Thanks figure (1) scaled = 255 * width/MAX; imshow(uint8(scal...
plus de 7 ans il y a | 1 réponse | 0
1
réponseQuestion
What does this error for hist mean?
Attempt to execute SCRIPT hist as a function: /Users/douglasbrenner/Documents/MATLAB/hist.m Error in extractedge (line 3...
plus de 7 ans il y a | 2 réponses | 0
2
réponsesWhat does this error for hist mean?
Got it. hist.m is now myhist.m
plus de 7 ans il y a | 0
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