plotting x vs y but not y vs x.

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

Answer 1

[Azzi Abdelmalek]

Maybe because your values are very small, try this

plot(x,y*1e+152)

[Azzi Abdelmalek]

After the plot, you can change the yticks to get the real values displayed in your plot

[Nikhil]

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]

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

Answer 2

[Youssef Khmou]

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)

[Nikhil]

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