MATLAB Central Newsreader - Suppress Plot Unit Modifiers

Suppress Plot Unit Modifiers

David Doria — Sat, 29 Mar 2008 17:30:05 -0400

Sometimes when I make a plot, if the x tic values are 1000,
2000 etc, it will show them as 1, 2, etc

and then put
x10^3

in the bottom right of the plot.

1) is there a way to set this location? It usually ends up
in an awkward spot, I'd like it inline with the xlabel

2) can you tell it "dont put this unit modifier"?

Thanks!

David

Re: Suppress Plot Unit Modifiers

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) — Sat, 29 Mar 2008 18:00:16 -0400

In article <fsluas$gr0$1@fred.mathworks.com>,
David Doria <daviddoria@gmail.com> wrote:
>Sometimes when I make a plot, if the x tic values are 1000,
>2000 etc, it will show them as 1, 2, etc

>and then put
>x10^3

>in the bottom right of the plot.

>1) is there a way to set this location? It usually ends up
>in an awkward spot, I'd like it inline with the xlabel

I do not know of any way to control the position. It is not in
any property that I have been able to find.

>2) can you tell it "dont put this unit modifier"?

set(gca,'XTickLabel',num2str(get(gca,'XTick').'))
--
  "The whole history of civilization is strewn with creeds and
  institutions which were invaluable at first, and deadly
  afterwards." -- Walter Bagehot

Re: Suppress Plot Unit Modifiers

David Doria — Sat, 29 Mar 2008 18:25:03 -0400

in this example:

x=1:1e5;
y=x.^2;
plot(x,y)
set(gca,'XTickLabel',num2str(get(gca,'XTick').'))

the axis labels become the actual values (ie 90000, etc).

Is there a way to extract the multiplier so you can divide
by it and get just 9, etc.

ie.

set(gca,'XTickLabel',num2str(get(gca,'XTick').'./MULTIPLIER))

Thanks,

David

Re: Suppress Plot Unit Modifiers

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) — Sat, 29 Mar 2008 18:40:18 -0400

In article <fsm1hv$dhm$1@fred.mathworks.com>,
David Doria <daviddoria@gmail.com> wrote:
>in this example:

>x=1:1e5;
>y=x.^2;
>plot(x,y)
>set(gca,'XTickLabel',num2str(get(gca,'XTick').'))

>the axis labels become the actual values (ie 90000, etc).

>Is there a way to extract the multiplier so you can divide
>by it and get just 9, etc.

xticks = get(gca,'XTick').';
pow10 = 10^floor(log10(min(xticks(:))));
set(gca,'XTickLabel',num2str(xticks ./ pow10));
--
"Any sufficiently advanced bug is indistinguishable from a feature."
-- Rich Kulawiec

Re: Suppress Plot Unit Modifiers

David Doria — Sat, 29 Mar 2008 19:08:01 -0400

well in this case since it starts at 0 I think we'd have to
use max() instead of min(), but I was wondering if there was
a more direct method to access what matlab has decided to be
the best scale factor , ie

get(gca, 'ScaleFactor') or something

Re: Suppress Plot Unit Modifiers

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) — Sun, 30 Mar 2008 03:13:18 -0400

In article <fsm42h$4gq$1@fred.mathworks.com>,
David Doria <daviddoria@gmail.com> wrote:
>well in this case since it starts at 0 I think we'd have to
>use max() instead of min(),

But then if your data runs (say) 8000 9000 10000 11000
then the output would be .8 .9 1 1.1 rather than 8 9 10 11 .
You could take the min() of the non-zero values, perhaps.

>but I was wondering if there was
>a more direct method to access what matlab has decided to be
>the best scale factor , ie

>get(gca, 'ScaleFactor') or something

If there is then it is undocumented and in some very hidden property.

But if you have a plot that you know it has happened to, then
you could get() the XTickLabel, str2double() the last of those,
get() the XTick, take the last of those, divide by the computed label,
and the result should be the scale factor that was involved.

Hmmm, for that matter,

set(gca, 'XTickLabel', get(gca, 'XTickLabel'))

might work!
--
"I think Walter was a very smart man." -- Gene Autry

Re: Suppress Plot Unit Modifiers

David Doria — Sun, 30 Mar 2008 03:34:01 -0400

haha good idea - that'll do it!