Displaying the Results

Now look at all of the results at the same time. The plotting window can be split into six sections, making each section display a different plot. The system variable !P.MULTI tells IDL how many plots to put on a single page.

Enter the following lines to display a plotting window which shows all of the plots simultaneously.

To display all plots at the same time with two columns and three rows, enter:

!P.MULTI=[0,2,3]

Now, display original dataset, upper-left:

PLOT,ORIGINAL,TITLE='Original (Ideal) Data'

Next, display noisy dataset in the upper-right:

PLOT,NOISY,TITLE='Noisy Data'

Display filter function, middle-left. The SHIFT function was used to show the filter's peak as centered.

PLOT,SHIFT(filter,100),TITLE='Filter Function'

Now, display low-pass filtered dataset in the middle-right:

PLOT,LOWPASS,TITLE='Lowpass Filtered'

Display high-frequency noise, lower-left:

PLOT,HIGHPASS,TITLE='Highpass Filtered'

Finally, display the SMOOTH function dataset for comparison with the low-pass filtered data in the lower right.

PLOT, smoothed, TITLE = 'Smoothed with Boxcar average'

Figure 5-8: Using !P.MULTI to Show Six Plots in One Plotting Window

Figure 5-8: Using !P.MULTI to Show Six Plots in One Plotting Window

Before continuing with the rest of the chapters, reset the plotting window to display a single image by entering the command:

!P.MULTI = 0