MATLAB: Hye Everyone. im newbie in matlab, then i want to ask you all about the simple question.

data coordinate and height

how i can i can store my data x,y@latitude,longitude and z@height in m-file? and how i can load it?

are like this?

10000   10010   -11
10010   10010   -13
10020   10010   -10
10030   10010   -9
10040   10010   -14
10050   10010   -17
10060   10010   -11
10070   10010   -14
10080   10010   -17
10090   10010   -8
10100   10010   -7
10000   10020   -15
10010   10020   -8
10020   10020   -9
10030   10020   -10
10040   10020   -11
10050   10020   -14
10060   10020   -8
10070   10020   -7
10080   10020   -6
10090   10020   -6
10100   10020   -8
10000   10030   -9
10010   10030   -10
10020   10030   -11
10030   10030   -14
10040   10030   -11
10050   10030   -12
10060   10030   -14
10070   10030   -9
10080   10030   -10
10090   10030   -12
10100   10030   -14

Best Answer

MyData = [10000   10010   -11
10010   10010   -13
10020   10010   -10
10030   10010   -9
10040   10010   -14
10050   10010   -17
10060   10010   -11
10070   10010   -14
10080   10010   -17
10090   10010   -8
10100   10010   -7
10000   10020   -15
10010   10020   -8
10020   10020   -9
10030   10020   -10
10040   10020   -11
10050   10020   -14
10060   10020   -8
10070   10020   -7
10080   10020   -6
10090   10020   -6
10100   10020   -8
10000   10030   -9
10010   10030   -10
10020   10030   -11
10030   10030   -14
10040   10030   -11
10050   10030   -12
10060   10030   -14
10070   10030   -9
10080   10030   -10
10090   10030   -12
10100   10030   -14];
save('MyData.mat', 'MyData')

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MATLAB: How to modify a matrix to change the entries >=0 and multiply it by 5 AND to change the entries <0 and add 2 to those entries

Start with "If an entry in B is greater than or equal to zero": You can either run a loop over all elements of B or use "logical indexing":

% Linear indexing:
for k = 1:numel(B)
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   end
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Or two indices for rows and columns:

for r = 1:size(B, 2)
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Or "logical indexing":

index = (B >= 0);
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Now try to use this to modify B. Use the mentioned terms to search in the documentation and in the internet.

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A(ceil(rand*numel(A)))

Best Answer

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MATLAB: How to modify a matrix to change the entries >=0 and multiply it by 5 AND to change the entries <0 and add 2 to those entries

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