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Accept 5 answers given by other contributors
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.
mehr als 5 Jahre vor | 0
Frage
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 ...
mehr als 5 Jahre vor | 3 Antworten | 0
3
AntwortenFrage
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 =...
mehr als 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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;...
mehr als 5 Jahre vor | 2 Antworten | 0
2
Antwortenhelp with fitlm (least squares fit)
I could try a Gaussian fit. That would work for me. Do you have an example for that? Thanks.
mehr als 5 Jahre vor | 0
help with fitlm (least squares fit)
Your demo crashed it as well.
mehr als 5 Jahre vor | 0
| akzeptiert
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.
mehr als 5 Jahre vor | 0
Frage
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 ...
mehr als 5 Jahre vor | 3 Antworten | 0
3
AntwortenWhy 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.
mehr als 5 Jahre vor | 0
Frage
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...
mehr als 5 Jahre vor | 3 Antworten | 0
3
Antwortenmatrix multiplication dimension issues
Found the answer. n is not the number of points in a spectrum but the number of spectra. Thanks for trying
mehr als 5 Jahre vor | 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...
mehr als 5 Jahre vor | 0
Frage
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...
mehr als 5 Jahre vor | 3 Antworten | 0
3
AntwortenFrage
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 - ...
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
fast 6 Jahre vor | 0 Antworten | 0
0
Antwortenreducing 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...
fast 6 Jahre vor | 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(...
fast 6 Jahre vor | 0
Frage
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...
fast 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
I want to do a least squares fit to the values around a matrix diagonal including the diagonal itself.
Suggestions?
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
fast 6 Jahre vor | 1 Antwort | 0
1
Antwortdimension 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 ...
fast 6 Jahre vor | 0
Frage
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...
fast 6 Jahre vor | 3 Antworten | 0
3
Antwortenerror 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...
fast 6 Jahre vor | 0
Frage
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 ...
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortGetting non-existent pixel values
Didn't work Index exceeds matrix dimensions. Error in stddev (line 51) greenChannel = b(:, :, 2); Is there a green pla...
mehr als 7 Jahre vor | 0
Frage
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 ...
mehr als 7 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
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...
mehr als 7 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
using greythresh and im2bw
Figure 1 is great but BW is all black. Thoughts? Thanks figure (1) scaled = 255 * width/MAX; imshow(uint8(scal...
mehr als 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
mehr als 7 Jahre vor | 2 Antworten | 0
2
AntwortenWhat does this error for hist mean?
Got it. hist.m is now myhist.m
mehr als 7 Jahre vor | 0
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