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Easy question on for loops and if statements [message #91451]

Thu, 16 July 2015 10:15

larosaant94
Messages: 3
Registered: July 2015

Junior Member

I am plotting the magnetic field longitude and using the ATAN function to do so. Though the ATAN function gives a result between the range of -180 to +180. I wish to use a range of
0 to 360.

A look at the code:

Bx = data(10,*)
By = data(11,*)

longitude = 180/!Pi* atan(By, Bx)

FOR j=0,N_Elements(longitude)-1 DO BEGIN
IF longitude[j] lt 0 THEN BEGIN
longitude = 360 + longitude
ELSE
longitude = longitude
ENDFOR

;Does the actual plotting-----------

plot, time, longitude, yrange=[0, 360], yticks=4, yminor=6, $
ytitle='Lambda', position=[0.1, 0.24, 0.95, 0.31], xtickname=blnklb
plots, [min(time), max(time)], 180.0*[1,1], linestyle=2

I want any number less than 0 to get 360 added to it and then once this is completed plot all the data points including the ones above 0!

Thanks!

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[Message index]

		Easy question on for loops and if statements By: larosaant94 on Thu, 16 July 2015 10:15
		Re: Easy question on for loops and if statements By: Michael Galloy on Thu, 16 July 2015 11:24
		Re: Easy question on for loops and if statements By: larosaant94 on Thu, 16 July 2015 11:30
		Re: Easy question on for loops and if statements By: Phillip Bitzer on Thu, 16 July 2015 11:51
		Re: Easy question on for loops and if statements By: larosaant94 on Thu, 16 July 2015 13:37

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