# New IDL User Questions

• Subject: New IDL User Questions
• Date: Tue, 8 May 2001 12:38:16 -0500
• Newsgroups: comp.lang.idl-pvwave
• Organization: WebUseNet Corp http://www.usenetserver.com - Home of the fastest NNTP servers on the Net.
• Xref: news.doit.wisc.edu comp.lang.idl-pvwave:24861

```Hello,

I'm new to IDL, but not new to programming.  I have
the IDL manuals and Dr. Fanning's excellent book, nevertheless,
I have a few basic questions:

1.  Editor Screen
a.   Is there a way to make the Editor full screen or extend
over some of the other windows?   Using resize doesn't do it.
Does everyone confine themselves to this small window on their
code?
b.  My scrolling mouse will scroll in the Output Log and Variable
Watch
windows, but not in the Editor Window.  Que pasa?

2.  Array Operations - Not being used to IDL type of array operations,
is there a simpler way to do the following?
a.
For I = 0, 199 Do Begin
For J = 0, 84 Do Begin
If (ImageMask[I,J] EQ 1) Then ImageROI[I,J,*] =
ImageS[I,J,*]
Else ImageROI[I,J,*] = 0
EndFor
EndFor
I thought of using the WHERE function as in,
but ImageROI[ROI} = ImageS{ROI} leaves out the third dimension.

b.     ;blow-up image X 9 For Screen Display
For j = 0,84 Do Begin
For i = 0,199 Do Begin
JImage[3*i,3*j]         = ImageS[i,j,[4]]
JImage[3*i,3*j+1]     = ImageS[i,j,[4]]
JImage[3*i,3*j+2]     = ImageS[i,j,[4]]
JImage[3*i+1,3*j]     = ImageS[i,j,[4]]
JImage[3*i+1,3*j+1] = ImageS[i,j,[4]]
JImage[3*i+1,3*j+2] = ImageS[i,j,[4]]
JImage[3*i+2,3*j]     = ImageS[i,j,[4]]
JImage[3*i+2,3*j+1] = ImageS[i,j,[4]]
JImage[3*i+2,3*j+2] = ImageS[i,j,[4]]
EndFor
EndFor

I don't use the EXPAND function because I don't want to interpolate
the data.

3.  PLOT
I have a couple of plots I want on the same Y Scale, the larger of
the two
data sets.  Presently, I use plot to generate the scale to !y.range, and
then test
the two ranges and re-plot, as in.

Window, 0, Title = '  P Target;  NPix = ' + string(Fix(NumOnes)), \$
XSize = 350, YSize = 350, XPos = 0, YPos = 0
Plot, WavL, MeanPT, PSYM = 2, TickLen = 1, XGrid = 1, YGrid = 1
PTYRange = !y.crange
Window, 1, Title = '  P BkGnd;  NPix = ' + string(Fix(17000 - NumOnes)), \$
XSize = 350, YSize = 350, XPos = 0, YPos = 375
Plot, WavL, MeanPB, PSYM = 2, TickLen = 1, XGrid = 1, YGrid = 1
PBYRange = !y.crange
SPRange = Max([PTYRange[1], PBYRange[1]])
MaxY = [0,SPRange]

; replot all with new, uniform Y scale
Window, 0, Title = 'P Target;  NPix = ' + string(Fix(NumOnes)), \$
XSize = 350, YSize = 375, XPos = 0, YPos = 0
Plot, WavL, MeanPT, PSYM = 2, TickLen = 1, XGrid = 1, YGrid = 1, YRange =
MaxY
Window, 1, Title = 'P BkGnd ;  NPix = ' + string(Fix(17000 - NumOnes)), \$
XSize = 350, YSize = 350, XPos = 0, YPos = 375
Plot, WavL, MeanPB, PSYM = 2, TickLen = 1, XGrid = 1, YGrid = 1, YRange =
MaxY

this seems inefficient, what is a better way?

Thanks,

John Piccirillo

```