How to begin axis from another value and make it a 0 point in plot matlab?

Hi,

I have some measurements. On the x label they starts from 0 to 100, but from 23 I can see something change on the plot, so I want to show a plot from 23 to 100, and that is how i do this:

plot(x,y)

axis(23, 100, 0, 40)

let's say that y is from 0 to 40 and i don't want to change it.

But now I want to make 23 a 0, so then the 100 whould be 77- how can I make this?

Thanks

Answer 1

[Benjamin Kraus]

If you want the ticks on your plot to show something other than the real numbers, you can either (a) change the numbers, or (b) manually specify your tick values.

To demonstrate, let me create some fake data:

x = 0:100;
fakedata = x/10;
fakedata(24:end) = sin(fakedata(24:end)-2.3)+2.3;
plot(x, fakedata)

Your two options are to either: change the X-values to something different (recommended):

plot(x-23, fakedata)
xlim([0 77])

Or manually specify your tick values:

plot(x,fakedata)
xlim([23 100]);
xticks(23:10:100);
xticklabels(0:10:77);

[Magda]

Thank You very much for Your help! :)

Answer 2

[Jos (10584)]

1) change the limits

plot(x,y)
xlim([23 100])

2) change the data (not recommended)

plot(x,y-23)

Answer 3

[KSSV]

xlim([23 100])

Read about xlim and ylim

Answer 4

[Magda]

Thank You for Your response, but i meant something else

For example I made my axis from 2 to 10 because only on this range I have sth interesting, and the same plot I want to have in the range from 0 to 8 (I want cheat a little bit my measurements that the beginning of measure is somewhere else) In this example it would looks like this:

The first one is with Your recommendetion (xlim), and the second one is what I want