Plotting 3 unequal vectors

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jchris14 2016-8-22

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https://ww2.mathworks.cn/matlabcentral/answers/300503-plotting-3-unequal-vectors

评论： Star Strider 2016-8-22

采纳的回答： Star Strider

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Hi guys,

having a little trouble plotting this. I want to plot timeMat in the x axis and other vectors (GrayValScan,StoreData) in the y axis. Note: GrayValScan and StoreData are both different dimensions from each other as well.

timeMat= abs(-860:0);
i=3;
n=107;
while n<=107
    figure
    hold on
    plot(timeMat,GrayValScan)
    plot(timeMat,storeData(:,i))
    hold off
    i= i+1;
end

I tried doing this based on another answer and repeat it for the other vector. Nothing worked.

maxLength = max(timeMat); 
GrayValScan(length(timeMat)+1:maxLength) = 0;

Any suggestion? Thanks in advance

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Star Strider 2016-8-22

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/300503-plotting-3-unequal-vectors#answer_232474

在 MATLAB Online 中打开

I would use the linspace function:

GVStimeMat = linspace(-860, 0, length(GrayValScan));
SDtimeMat = linspace(-860, 0, size(storeData,1));
i=3;
n=107;
while n<=107
    figure
    hold on
    plot(GVStimeMat,GrayValScan)
    plot(SDtimeMat,storeData(:,i))
    hold off
    i= i+1;
end

NOTE — I don’t have your data, so this is UNTESTED CODE. It should work.

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jchris14 2016-8-22

Thank you for the explanation. I didn't realize that the n value didn't do anything in the loop. I took it out and dealt with just "I".

As for the dimension mismatch error I was getting, it was conditional error. I used a <= instead of just <

Star Strider 2016-8-22

My pleasure.

If you know in advance the limits ‘i’ should have, you can use a for loop. That might be more efficient, since it incorporates the incrementing of ‘i’ and would eliminate the separate counter increment assignment. (A while loop is best if you’re incrementing and testing a value calculated within a loop.)

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