plotting x vs y but not y vs x.

Question

Nikhil 2014-1-3

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评论： Youssef Khmou 2014-1-4

plot(xy)vsplot(yx).xlsx

Hello all,

I have two vectors XN and YN. Their values are mentioned in the excel file attached. I want to plot YN vs XN. when I enter following code: plot(XN,YN) I didn't get any result. But when I enter plot(YN,XN), matlab shows me correct plot.

Can you please help me to resolve this issue, why MATLAB is plotting x vs y but not y vs x?

Thank you in advance

Nikhil

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Answer 1

Azzi Abdelmalek 2014-1-3

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在 MATLAB Online 中打开

Maybe because your values are very small, try this

plot(x,y*1e+152)

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Nikhil 2014-1-3

Hey,

Thank you for your answer. It works this way. But if MALTAB can plot(y,x) without multiplying by any factor, why can't it just plot(x,y)....?

Thanks again, Nikhil

Youssef Khmou 2014-1-4

it worked without amplifying factor, this issue is not clear yet ...

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Answer 2

Youssef Khmou 2014-1-3

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https://ww2.mathworks.cn/matlabcentral/answers/111350-plotting-x-vs-y-but-not-y-vs-x#answer_119985

编辑：Youssef Khmou 2014-1-3

在 MATLAB Online 中打开

Nikhil,

with the file you posted, it plots correctly y=f(x) which has a peak in the abscissa x=4.

G=xlsread('file.xlsx');
x=G(:,1)
y=G(:,2)
plot(x,y)

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Nikhil 2014-1-3

Hey,

I am still not getting this plot. I am getting figure for plot(y,x) but I am getting blank figure for plot(x,y). I think there might be issue with version of Matlab I am using. Any help in this regard would be appreciated.

Thanks,

Nikhil

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