Changing values of axis

Hi!

I have a plot such as in the attached image. As you can see, the y-axis values range from 1E-7 - 10E-7. I would like to rescale it so that it ranges from simply 0.1-1. How would I do that?

Thanks in advance.

Alexander

Answer 1

[Sandro Lecci]

Hi Alexander,

To change the limits of the axis do the following:

set(gca, 'YLim', [0.1,1])

However, your data will not be displayed as they are smaller than the lower limit (0.1). You would want to multiply them by a specific factor, such as *1E6 ?

Best, Sandro

[Alexander Engman]

Hi Sandro,

thank you for your answer. The problem is that the plot is a contour plot, meaning my function depends on both the variable on the y-axis and the x-axis. So the values on the y-axis are predetermined and MATLAB formats the axis values automatically. I understand the point behind the formatting but for my purpose it is not ideal. Any ideas?

Answer 2

[Walter Roberson]

You can set the axes YTickLabels to whatever you want, including to strings that have nothing to do with the actual Y values.

You can use mat2gray() or the new rescale() to change the y values to your desired range before you plot them.

[Alexander Engman]

Thank you Walter. I found an easy solution. I though that multiplying the axis in the contour plot would change the plot values, but of course it doesnt. I just multiplied the y-axis values by 10E6 and then plotted on the appropriate scale.

[C,h]=contour(Vfvecq, rvecq*10^6, OPTq,'Color','k');