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Nathan Greco


Active since 2011

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Answered
for loop
The only thing that doesn't look right to me is where you have elseif size(qq)==[1,#] / size(qq)==[1,#+1] Where # is 6...

12 years ago | 0

Answered
Store fllepath in variable
Yes. Just store it as a string. filepath = 'C:\Users\ecorbett\Documents\MATLAB\Labelers\fred'; filename = 'text.csv'; ...

12 years ago | 1

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Answered
Determining Host ID
Does this help? http://www.mathworks.com/support/solutions/en/data/1-171PI/

12 years ago | 0

Answered
How do I access and modify only the non diagonal entries in a matrix?
If tmp is your matrix, try: tmp-diag(diag(tmp)) %works only with square matrices OR triu(tmp,1)+tril(tmp,-1) Both of...

12 years ago | 0

Answered
How did you learn MATLAB?
I started Matlab by being thrown into it through my internship at Sandia Natl. Labs two years ago. I learned how to program in M...

12 years ago | 0

Answered
Changing the names of text files in a directory
Maybe this will do? (Run this under your NAIC directory.) Assuming you are on a windows machine: files = dir('*.txt.*'); na...

12 years ago | 1

Answered
Nested loop problem !
Will this do what you are looking for: *EDIT:* a(:,3:end) = b(:,1:end-2); OR, if you really wanted a for loop: d = ...

12 years ago | 1

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Answered
Finding diag of two cells
Does this work for you? diag(cell2mat([a b])) Note that the solution is the same as: diag([a{1} a{2}]) To get the di...

12 years ago | 0

Answered
changes of data
You would not be able to use a matrix, as matrices can only contain the same data types (all numerical or all character arrays) ...

12 years ago | 0

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Answered
Marking where one clicked with ginput
I did something similar to this when measuring diameters of soot particles. I would frequently get lost as to where I last click...

12 years ago | 1

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Answered
Control Break Processing
Here's a dirty method, but no handwritten loops as requested. Assume tmp contains your 22x3 cell array of data (the 4th column ...

12 years ago | 0

Answered
Imprecise Basic operations
See: http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F Welcome to the world of floa...

12 years ago | 2

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Answered
Specify columns inside a for loop
You are only checking of the data within any given column is between 1 and 8, which isn't what you describe to be wanting. Ju...

12 years ago | 0

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Answered
Writing variable as filename using csvwrite
Try writing: csvwrite(filename,A); %without quotes

12 years ago | 0

Answered
dilation of specific objects
First, I would label regions in your image: bwl = bwlabel(img,8); Area of regions: a = regionprops(img,'area');...

12 years ago | 0

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Answered
Counting number of zeros in column or row, without looping
Given A: idx = A~=0; c = sum(idx,1); r = sum(idx,2);

12 years ago | 1

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Answered
Getting data values from a plot
User interpolation x = [1 2 4 5]; y = [1 3 4 9]; xi = x(1):.01:x(end); %values between x yi = interp1(x,y,x...

12 years ago | 0

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Answered
Manipulation of different size of matrices with strings and numbers
Look up the documentation for CELL, it might suit your needs. doc cell In regular matrices, you cannot mix data ty...

12 years ago | 2

Answered
montage function
The montage function allows you to input your own path to images that you want to use. doc montage Example, if the pictures...

12 years ago | 1

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Answered
I want a button to be pressed in MATLAB GUI when Enter key is pressed. How to do it?
I do something similar to this. Use keypress functions, and check to see if the current character being pressed is the enter key...

12 years ago | 1

Answered
Sorting Cell stucture with different data types
How about this one: [d ix] = sort(C{12}); newC = cellfun(@(x)x(ix),C,'un',0);

12 years ago | 0

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Answered
Last Axes Display Image
You have a scope issue. Try doing this instead (note the "end"s) function Axes N.fh=figure('unit','pix',... 'Position',[40...

12 years ago | 2

Answered
Challenge - Change my avatar colors
My "spy" command gives me a picture of a dog: spy To change the background and outline color in one shot: whitebg To c...

12 years ago | 0

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