QUESTIONSFEEDBACKHOMEEmploymentEventsLinksPeopleProgramsPublicationsSupportWelcome

IDL: 2-D Plotting

1. Simple Plotting
2. Plotting with Data Sets
3. LIVE_PLOT

Simple Plotting

First, we'll plot a simple graph using a sine function. Use the FINDGEN function here to specify the dimensions of the array. The FINDGEN function returns a single-precision, floating-point array, with the specified dimension, where each element of the array is set to the value of its one-dimensional subscript.  We also use a constant in creating this data (!PI).  The character (!) is used to indicate constant pre-defined values.

1. First, create a value for the X axis:

x=2*!PI/100*findgen(100)

2. Now, use PLOT to visualize the array:

plot,sin(x)

Now use OPLOT to plot the new information over the existing plot:

1. Plot at twice the frequency:

oplot,sin(2*x)

2. Plot at three times the frequency:

oplot,sin(3*x)

Plotting with Data Sets

1. Plot the first set of data on temperatures which is stored in Temp1

plot,plot_ascii.Time,plot_ascii.Temp1

2. Plot with titles:

plot,plot_ascii.Time,plot_ascii.Temp1,title='Temperature Over Time', $
xtitle='Time in Seconds',ytitle='Temperature Celsius'

LIVE_PLOT

2. Create a LIVE plot

live_plot,plot_ascii.Temp1,plot_ascii.Temp2, $ name={data:['Temp1','Temp2']}