1.P2 If you are using Windows 3.1 or Windows 3.11, keep track of your resources as you DISPLAY more and more images on the screen. You can monitor resources using the Control-R toggle (or by clicking on this option in the Environment menu). If you see any of the resources approach as few as 10-15%, you should not try to display further images simultaneously, but rather, close some images before proceeding further. Windows 95 and Windows NT users should have no problem bringing all images onto the screen.
1.P3 The Principal Components Analysis routine in IDRISI is named PCA, and can be found under the Image Processing submenu of the Analysis menu. Unstandardized PCA is the default. Indicate that the output image should be created using the three-letter prefix "H87" (without the quotes). This will produce output images named H87CMP1 through H87CMP7 for Components 1 through 7 respectively. You can print the tabular data produced by this procedure by clicking on the button with the printer icon of the results form.
1.P4 Again, use DISPLAY to view both of these images with autoscaling and the GREY256 palette.
1.P5 Again, use DISPLAY to view both of these images with autoscaling and the GREY256 palette.
1.P6 Again, use DISPLAY to view this image with autoscaling and the GREY256 palette.
1.P7 Again, use DISPLAY to view this images with autoscaling and the GREY256 palette. If you are prone to Windows resource problems, you may need to clean your screen of other images before looking at this set.