Subrange + matrix

Have you already tried to plot the whole matrix and to use just the usual graphical tools to zoom in on it? Or is your matrix too big for that? Igor can handle quite big data objects easily.

Subranging 2D waves ("matrices") in Igor follows the pattern matrix[p-range][q-range] or matrix(x-range)(y-range). (NOT matrix[p-range, q-range]). It can be used in wave assignments or directly for graphing. This is explained in the documentation.

You can learn more by executing from the command line
DisplayHelpTopic "Multidimensional Wave Indexing"
or
DisplayHelpTopic "Subrange Display"

Wolfgang

March 1, 2010 at 12:32 pm - Permalink

hrodstein

You can use the Duplicate operation to extract a submatrix:

Make/N=(100,100) mat1

mat1 = sin((p-50)/25)^2 * cos((q-50)/25)^2

NewImage mat1

Duplicate/O/R=[0,49][0,49] mat1, mat2  // Subset

NewImage mat2

Duplicate/O/R=[50,99][0,49] mat1, mat2  // Different subset

March 1, 2010 at 06:08 pm - Permalink