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Code for a function for matrixes?
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Hi,
Can I have some help for this code for the manual entering of a max function?
I was thinking of doing a if statement to keep tracking each number, but I am stuck. I currently have:
function [a b] = myMax(v)
maxHigh = 0;
currHigh = 1;
for i = 1:length(v)
if maxHigh > currHigh
currHigh = maxHigh
end
end
Thank you
3 Comments
Answers (1)
Image Analyst
on 6 Mar 2017
John, your code is very close but you need to initialize the variables and store the row the max shows up in. I renamed some variables and saved the row. Here's a little more to get you going:
function [columnMaxes, rowsOfMax] = myMax(v)
[rows, columns] = size(v);
columnMaxes = -inf * ones(1, columns);
rowsOfMax = zeros(1, columns);
for col = 1 : columns
for row = 1 : rows
thisValue = v(row, col);
if thisValue > columnMaxes(col)
columnMaxes(col) = thisValue;
rowsOfMax(col) = row;
end
end
end
end
See that it works for both 1-D arrays (both column vectors and row vectors), and 2-D arrays. You might put in a check to see if it's a 3-D array and popup an error message with sprintf(), uiwait(), and errordlg().
19 Comments
Walter Roberson
on 8 Mar 2017
Edited: Walter Roberson
on 8 Mar 2017
As your first line inside the function,
if isvector(v); v = v(:); end
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