| Re: Multiple plots in one figure [message #68304] |
Mon, 12 October 2009 16:53 |
Nicki
Messages: 14
Registered: September 2009
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Junior Member |
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On Oct 13, 9:59 am, David Fanning <n...@dfanning.com> wrote:
> Nicki writes:
>> Oh, okay, that was pretty easy...
>
>> Thanks!
>
>> So what if i have another equation where i put the y in and that's the
>> one I want to plot.
>> so let's say
>
>> g=5*y
>
>> and i want to plot x versus g...
>
> I've no idea what this means. But I can see you are
> pretty confused yourself. Why don't you take a few
> minutes to think very clearly about what you are trying
> to do. Maybe even write the steps down. And then look
> carefully at the example I sent you so you can see
> how it works. When you can describe it, in words,
> perhaps you can see your way clear to making this work.
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Coyote's Guide to IDL Programming (www.dfanning.com)
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
Yes... I got it.
Thanks a lot!!!
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| Re: Multiple plots in one figure [message #68305 is a reply to message #68304] |
Mon, 12 October 2009 15:59  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Nicki writes:
> Oh, okay, that was pretty easy...
>
> Thanks!
>
> So what if i have another equation where i put the y in and that's the
> one I want to plot.
> so let's say
>
> g=5*y
>
> and i want to plot x versus g...
I've no idea what this means. But I can see you are
pretty confused yourself. Why don't you take a few
minutes to think very clearly about what you are trying
to do. Maybe even write the steps down. And then look
carefully at the example I sent you so you can see
how it works. When you can describe it, in words,
perhaps you can see your way clear to making this work.
Cheers,
David
--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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| Re: Multiple plots in one figure [message #68306 is a reply to message #68305] |
Mon, 12 October 2009 15:39 |
Nicki
Messages: 14
Registered: September 2009
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Junior Member |
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Oh, okay, that was pretty easy...
Thanks!
So what if i have another equation where i put the y in and that's the
one I want to plot.
so let's say
g=5*y
and i want to plot x versus g...
Or maybe I just print my code for my specific problem:
a=70.
nrows=3.
dfov=60.
mu=438.689
r_tot=1.5
r_i=[0.1,1.0]
wdet=[25,100]
f=findgen(90)+10.
r=dfov/2/(sin(a/2/180*!pi))
z=r+f
;________________________________
for i=0,1 do begin N=2.*!pi*(r+f)/(1.1*wdet[i])*Nrows
d=sqrt(R_tot^2-(r/f)^2*(R_i[i])^2)/((r/f)+1.)-alog(2)/mu*tan (a/2*!pi/
180)
deffs=sqrt(d^2+2/mu*d*tan(a/2*!pi/180)+2/(mu^2)*(tan(a/2/180 *!pi))^2)
S=N*deffs^2/16/(r^2)*100
endfor
;____________________________________________
for i=0,1 do begin
if i eq 0 $
then plot, N, S
elso oplot, N, S, linestyle=i
endfor
Does not work... I tried to change the N and the d to N[i] and d[i]
and then also the following N and d and and also the deffs to deffs[i]
and the S to S[i]
and then
for i=0,1 do begin
if i eq 0 $
then plot, N[i], S[i] $
else oplot, N[i], S[i], linestyle=i
endfor
but that does not work either...
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| Re: Multiple plots in one figure [message #68309 is a reply to message #68306] |
Mon, 12 October 2009 05:43 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Nicki writes:
> Seriously, i am so lost, since i do not even know what keywords I have
> to look up in order find a solution for this problem... I mean the
> multiple plots in one figure are not the problem, the problem is to
> find the EASIEST way to solve this...(however i don't really know HOW
> to do the multiple plotting for this case, either)
> if i start saying (note that a[0] should belong to m[0] and a[1] to b
> [1] and so on, so that I end up with 3(!!) plots)
>
> x=findgen(10)
> m=[1,5,10]
> a=[1,4,2]
>
> y=m[i]*x+a[i]
>
> if i eq 0 then plot,x,y
> else oplot,x,y
>
>
> whaaaa, i don't know it... this does not work...
Well, it is hard to know if you are typing *actual*
code or pseudo code. But this works:
x=findgen(10)
m=[1,5,10]
a=[1,4,2]
for j=0,2 do begin
if j eq 0 $
then plot, x, m[j]*x+a[j] $
else oplot, x, m[j]*x+a[j], linestyle=j
endfor
end
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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| Re: Multiple plots in one figure [message #68310 is a reply to message #68309] |
Mon, 12 October 2009 04:53 |
Wout De Nolf
Messages: 194
Registered: October 2008
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Senior Member |
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On Mon, 12 Oct 2009 03:55:37 -0700 (PDT), Nicki
<nickireiter87@yahoo.de> wrote:
> x=findgen(10)
> m=[1,5,10]
> a=[1,4,2]
>
> y=m[i]*x+a[i]
>
> if i eq 0 then plot,x,y
> else oplot,x,y
>
>
> whaaaa, i don't know it... this does not work...
You are looping over i right? So how is it not working? What do you
see?
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| Re: Multiple plots in one figure [message #68311 is a reply to message #68310] |
Mon, 12 October 2009 03:55 |
Nicki
Messages: 14
Registered: September 2009
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Junior Member |
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Seriously, i am so lost, since i do not even know what keywords I have
to look up in order find a solution for this problem... I mean the
multiple plots in one figure are not the problem, the problem is to
find the EASIEST way to solve this...(however i don't really know HOW
to do the multiple plotting for this case, either)
if i start saying (note that a[0] should belong to m[0] and a[1] to b
[1] and so on, so that I end up with 3(!!) plots)
x=findgen(10)
m=[1,5,10]
a=[1,4,2]
y=m[i]*x+a[i]
if i eq 0 then plot,x,y
else oplot,x,y
whaaaa, i don't know it... this does not work...
Please, if you cannot give me the answer, can you maybe at least give
me some keywords that i can look up...
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| Re: Multiple plots in one figure [message #68312 is a reply to message #68311] |
Sun, 11 October 2009 21:01 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Nicki writes:
> I just recently started to use IDL. I'm now having the following
> problem... i need to get one figure with multiple plots in it. I
> already know how to do this, but just in a really complicated way...
>
> say, i have the following equation: y=mx+a
>
> and for m=1 my a is 1
>
> and for m=10 my a is 2
> and let's get a third plot, let's say for m=5 and and for that case
> the a is equal to 4
> or something like that... and now i want to have one figure with the 3
> plots in it...
>
> so far i have done it like this:
>
> m1=1
> a1=1
>
> m2=10
> a2=2
>
> blaaa and then y1=m1*x+a1 and so on and then plot, overplot etc..... I
> know this is faar too complicated and there should be something far
> simpler starting with
>
> m=[1,5,10]
> a=[1,4,2] or so...
>
>
> i tried to read it up but i don't get it... something with 'if... do
> begin... else...' isn't it?! :) You see i have no idea...
>
> Can somebody help me out??
You are doing it the right way. At least, I *think* you are. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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