Analysis example 1
/ date-cubes / Enk / 128-96-100.raw, and 128-96-100.rpl
separately from http://www.nist.gov/lispix/Lx04Doc/dnld/dnload.html
and put them in the images folder, or
wherever you wish.).
If a matching
.rpl file is not there, then open the File / Import - Export
Tool, set the parameters, then use i/o / import from file.
Note that the
format of the .rpl file is now text, tab
delimited, as is written from a spread
Top row has collumn
labels. Need at least two (arbitrary) labels,
as the .rpl file must have at least two
Values in rows
are separated by one tab, and any number
a semicolon is ignored.
Lispix opens cube showing slice
0. Image of this size better seen using 'zoom
/ 2' , which will also get rid of
the white space.
PCA of original cube (less
Use regions slider
to eliminate the blank images at the beginning.
I eliminated more slices than is absolutely necessary, I
suppose. I cut off some at the end, just for good
The slider can
be resized, as well as the plot window.
of the plot in detail using 'view / navigator'
which works for both images and plots.
PCA / of cube
See score cube
- here zoomed x2, and slider
resized. Also see Eigenvalue chart, showing
most of info to be in the first few slices.
Color overlay and score plots
Extract first 3 slices
into individual images:
The order of the images
depends on when they were clicked.
They can also be sorted
using 'window / sort up'
and 'window / sort down'.
/ 2 & 3 variable'.
Select the three
images by clicking first on the image, and
then on the appropriate button, in turn.
/ make RGB overlay.
plots ' / 2-d
Larger images have more
counts in the scatter diagram, and have more colors.
on the xy plot using 'Select / draw rectangle'.
Make mask image
with 'Select /mask from rectangle' (B, below).
(The mask image
serves as a record of what area of the
scatter diagram was selected. The yellow rectangle is forgotten
when another one is drawn.)
Click on mask
image, then '2 & 3 variables / mask! '
mask (M, below) with 'scatter plots / traceback'.
To highlight the pixels
in the traceback mask:
Make an image of the cube
data: 'Image / sum image from whole
To overlay the traceback on the sum image:
'TOOLS / 2 & 3
Click on the sum image,
then '2 & 3 variables / green/y!
Click on the traceback
mask image, then on
Make the RGB overlay
with 'RGB overlay / make RGB overlay'. The
image data will be in green, with the highlighted areas in magenta - white.