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{alias:igg}
h2. Name
*igg* — Interpolated grid to grid operation
h2. Syntax
{panel:|borderStyle=solid|borderWidth=1|bgColor=#FFFFAA}
*igg add | sub | mul | div | lt | gt | rep* \[*und*] _workspacename_
{panel}
h2. Description
General grid to grid operation that does not require that the grids involved has the same size and position.
h2. Arguments
_workspacename_
{indent}Name in workspace where the second grid is present. Must always be present.{indent}
*add*
{indent}The grids are added.{indent}
*sub*
{indent}The grid in _workspacename_ is subtracted from the active grid.{indent}
*mul*
{indent}The grids are multiplied.{indent}
*div*
{indent}The active grid is divided by the grid in _workspacename_.{indent}
*lt*
{indent}The result grid in active will be minimum of either of the two grids.{indent}
*gt*
{indent}The result grid in active will be maximum of either of the two grids.{indent}
*rep*
{indent}Replace all undefined areas with values from grid in workspacename.{indent}
*und*
{indent}Undefined values returned from the interpolation should be used in the new dataset.{indent}
h2. Examples
h3. Ex.1: Adding grids of unequal dimension
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Name
igg — Interpolated grid to grid operation
Syntax
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igg add | sub | mul | div | lt | gt | rep [und] workspacename |
Description
General grid to grid operation that does not require that the grids involved has the same size and position.
Arguments
workspacename
add
sub
mul
div
lt
gt
rep
und
Examples
Ex.1: Adding grids of unequal dimension
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# Adding grids of unequal dimension
z ;# Erase screen
win demo ;# Get demo window (450000 460000 6450000 6460000 1000 4000)
spe bgc whi ;# Specify background color to white
mak ran 12 z 100 700 ;# Make 12 random points between 100 and 700
grp 222 222 ;# Make grid of dimension 222 x 222
eli gt 500 ;# Eliminate greater than 500
mhi mygrid ;# Save the grid
ewi 25 ;# Expand the grid 25% in xy direction
mak ran 11 ;# Make 11 random points
grp 300 300 ;# Make grid of dimension 300 x 300
bol 2 ;# Draw the border layout
igg sub mygrid ;# Add the two grids of different dimension together
ssc ;# Scale new dataset
acm n 11 sma ;# Map the result grid using color bands
{noformat}
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The
...
above
...
example
...
produces
...
this
...
image.
...
Border layout of adding grids and result grid
See also
add - Add to dataset , eli - Eliminate points , rep - Replace , und - Undefined change