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Question on Graphing / Plotting
You're likely looking for |ezplot|. Regular plot doesn't play well with syms: syms x Y = sin(x); dY = diff(Y); ezplot(Y...

13 years ago | 0

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Plot contour lines on top of imagesc?
You can specify x/y for |imagesc| so that the image is not shown against its index. From there you can simply use |hold on| and...

13 years ago | 0

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Extremely slow imshow() when using 16-bit images
X = uint16(rand(1000)*60000); t = 0; figure;ax = axes; for ii = 1:10 tic; imshow(X,'parent',ax); drawnow; ...

13 years ago | 0

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An easy Array question
Are you sure you need a cell array? I would just use a |for|-loop and loop over the start and end indices: sidx = start ...

13 years ago | 0

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how to run selected text in 2012b editor?
# Select *.m file text # Right click # Evaluate selection or hit F9 isn't working? If it isn't you'll have to go into _...

13 years ago | 4

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MODLAND Tile Calculator MATLAB
It looks like you probably want <http://www.mathworks.com/help/releases/R2012b/map/ref/mfwdtran.html |mfwdtran()|> and friends (...

13 years ago | 0

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[Medical images] How to get a 3D model from a CT (DICOM) using Matlab.
For reading the dicom files into MATLAB, I would start with one of these utilities: <http://www.mathworks.com/matlabcentral/f...

13 years ago | 0

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How to vectorize a find
If you only have zeros and ones and you are *positive* there is atleast one one, then you can use the second output from |max()|...

13 years ago | 0

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How to create a vectorfield?
doc meshgrid doc quiver3 doc coneplot Not sure of the details of what you want but it's likely some combination of the ab...

13 years ago | 0

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GUI Keyboard Commands HELP
Yes! You need to steal focu back to the figure from whatever |uicontrol/uipanel/axes/etc.| has stolen it. To do this, at t...

13 years ago | 0

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Preallocation for a cell help needed
It sounds like you should assign an empty cell to each value: S = struct('field1',cell(10,1)); You can then fill in the ...

13 years ago | 0

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Does logical indexing have a direct inverse?
I.e: A(X~=0) = B ?

13 years ago | 0

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Assistance with simple error
And in MuPAD, all you have to do is paste what you have above into a code line.

13 years ago | 0

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Help with matrix manipulation
cell2mat(rotated) ?

13 years ago | 1

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my own imhist function error
This oughtta make it pretty clear: im2double(uint8(1:10:255))

13 years ago | 0

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Color map and color bar of the overlaid index image on a gray scale background image?
You will need to set the the _'ylim'_ of the colorbar to only be the range of the indexed image and you will have to adjust the ...

13 years ago | 0

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any faster implementation for 2D interpolation by column
Are all columns of _X,Xi_ the same? If so, |interp1| can handle the matrices directly: x = (1:3).'; y = magic(3); xi = [...

13 years ago | 0

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How do I define a structure that has an element which is an array?
total_payroll = total_payroll + personnel.name(i).salary; _total_payroll_ is never defined before being used for the first...

13 years ago | 0

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Plotting with true colors in an uneven grid
|pcolor| is just creating a surface so you could do this explicitly yourself and then view it in two dimensions: surf(xmesh...

13 years ago | 0

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How to pass the name of a file to a function - dataset
Two things: 1) Apparently the file _tryB.m_ is not saved on your ML path. Add the folder it's in to the path 2) |inputn...

13 years ago | 0

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Answered
How to Downsample image in both Horizontal and Vertical Direction
For grayscale: Xdown = X(1:2:end,1:2:end); If it's RGB, keep the third dimension: Xdown = X(1:2:end,1:2:end,:);

13 years ago | 5

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Answered
Using an empty matrix as an Index
What do you expect it to return? If it's not being indexed by anything then it shouldn't extract anything. Perhaps this will l...

13 years ago | 2

Solved

Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

13 years ago

Answered
Filtering a matrix with different rules for each columns
Vectorized with logical indexing: C = AB(AB(:,1)>0.5 & AB(:,2)<0.2,:);

13 years ago | 2

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how to detect folder address
doc dir Is probably the individual most important since it gives you everything the folder. These may help as well: ...

13 years ago | 0

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Error: Contour endpoints and waypoints must be finite.
It looks like it's complaining about this line: Cv(t) = (Cpi(t)-R) + (T(t).*integral(SecondDerivative,Inf,v(t))); becaus...

13 years ago | 0

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May I get the matlab code for Otsu's method of Thresholding (Gray Scale Image)?
edit graythresh

13 years ago | 2

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Question about ordering and sorting matrices
Well first, you'll have to use |hex2dec| to get the hexadecimals to decimals. Second, can you make a smaller example of what ...

13 years ago | 0

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Invalid File Identifer - Help
What is the value of _fid_? I'll assume it's negative and you can likely find the explanation in: doc fopen I.e. try ...

13 years ago | 0

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Data extraction from CSV file
Are you using R2012b? If so - use the Import Wizard. Click *"Import Data"* on the home tab and if the *.csv file has any str...

13 years ago | 0