Customizing the tick values and labels along x axis

Hi All,

When I plot(1:20, f), the x-axis are shown from 1 to 20. However my real x values are

x =

  Columns 1 through 13

   30.0000   28.0000   26.0000   24.0000   22.0000   20.0000   18.0000   16.0000   14.0000   12.0000   10.0000    8.0000    6.0000

  Columns 14 through 20

    4.0000    2.0000    1.0000    0.8000    0.6000    0.4000    0.2000

and I'd like the real x values to show up in the figure. To do so, I used

    xticks([x])

and got an error that says

    Value must be a numeric vector whose values increase.

Any idea how I can fix this issue?

Thanks in advance

Answer 1

[Star Strider]

Try something like this:

x = [30.0000   28.0000   26.0000   24.0000   22.0000   20.0000   18.0000   16.0000   14.0000   12.0000   10.0000    8.0000    6.0000    4.0000    2.0000    1.0000    0.8000    0.6000    0.4000    0.2000];

figure
plot(rand(1,20))
set(gca, 'XTick',1:20, 'XTickLabel',compose('%g',x))

EDIT — (23 Jun 2021 at 22:21)

Since I’m not certain what you’re actually doing, another option is:

x = [30.0000   28.0000   26.0000   24.0000   22.0000   20.0000   18.0000   16.0000   14.0000   12.0000   10.0000    8.0000    6.0000    4.0000    2.0000    1.0000    0.8000    0.6000    0.4000    0.2000];

figure
plot(x, rand(1,20))
set(gca, 'XTick',sort(x), 'XDir','reverse')

.

[Susan]

Thank you so much, @Star Strider!

[Star Strider]

As always, my pleasure!