[ncl-talk] xy plot error

[BLIUJUS, STEVEN D CTR USAF AFMC AFLCMC/HBAW-OL]

Thank you, changing the type of array to double fixed the problem.

Steve

-----Original Message-----
From: Adam Phillips [mailto:asphilli at ucar.edu] 
Sent: Thursday, January 28, 2016 6:04 PM
To: BLIUJUS, STEVEN D CTR USAF AFMC AFLCMC/HBAW-OL
Cc: ncl-talk at ucar.edu
Subject: Re: [ncl-talk] xy plot error

Hi Steven,
That error message generally occurs when one data type is getting passed to an array of a different data type. Some exceptions are allowed, like when you pass a float or integer into a double array as behind the scenes NCL promotes the input float/integer to a double. In this case, you are passing a double array into a float array. Add the following printVarSummary statements to your code right before line 51:
printVarSummary(data)
printVarSummary(var1_reorder)
You will see that data is a float array and var1_reorder is a double array, and thus this line will exit out in error:
data(0,:) = var1_reorder(120,:)

The solution is to set data to a double array. (That way you can pass float or double arrays into it.) data = new((/2,dimsizes(var1_reorder(120,:))/),double)


Or, if you know that both of your input files are of the same type you can use the typeof function to match the data array type to the var1_reorder data type:
data = new((/2,dimsizes(var1_reorder(120,:))/),typeof(var1_reorder))


Hope that helps. If not, or if you have any further questions please respond to ncl-talk.
Adam


On Thu, Jan 28, 2016 at 2:03 PM, BLIUJUS, STEVEN D CTR USAF AFMC AFLCMC/HBAW-OL <steven.bliujus.3.ctr at us.af.mil> wrote:


	I am trying to create a line graph with two lines (one variable from each
	file). I am usng it to compare two variables. So I' am creating the array to
	do so, but when the array is created I get an error when trying to assign
	the value:
	
	fatal:Assignment type mismatch, right hand side can't be coerced to type of
	left hand side
	fatal:["Execute.c":8128]:Execute: Error occurred at or near line 51 in file
	Scatterplot.ncl
	
	I am not sure exactly why. The variable is an array 180x359. In this case
	I'm trying to plot the line for point 120.
	
	I have attached the script and one of the files. (This file is the file
	being used when the program fails).
	
	Steven Bliujus, Contractor
	SEMS/16WS WXE
	557th Weather Wing
	DNS: 232-7151
	
	
	
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-- 

Adam Phillips 

Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR

www.cgd.ucar.edu/staff/asphilli/   303-497-1726 


<http://www.cgd.ucar.edu/staff/asphilli>