curvop

NAME

curvop - mathematical operations with curves

SYNOPSIS

curvop -{s|a|v|m|d} file1 file2 > output

DESCRIPTION

Curvop subtracts, adds, averages, divides or multiplies two curves represented by x, y values in file1 and file2. The resulting curve is defined at the x-values in file1; if the x-values in file2 do not correspond, linear interpolation is performed between neighboring points in file2 to obtain corresponding values for the operation. Naturally, the curve resulting from the operation is only defined for the region of file1 that is covered by file2. The source code is in the src/carnal/etc/ directory.

OPTIONS

-s

Subtract file1.y - file2.y.

-a

Add file1.y + file2.y.

-v

Average file1.y and file2.y.

-m

Multiply file1.y * file2.y.

-d

Divide file1.y / file2.y. If the Y value for file2 is 0, the program will stop with an error message.