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Top Forums Shell Programming and Scripting Enter third column & Perform Operation Post 302529856 by Ernst on Friday 10th of June 2011 04:58:22 PM
Old 06-10-2011
Enter third column & Perform Operation

I am trying to enter a third column in this file, but the third column should that I call "Math" perform a some math calculations based on the value found in column #2.
Here is the input file:

GERk0203078$ Levir
Cotete_1 84412351
Cotete_2 39308596
Cotete_3 39393962

GERk0203040$ Levir
Cotete_1 37235657
Cotete_2 84227986
Cotete_3 30187827

GERk0203050$ Levir
Cotete_1 37217582
Cotete_2 30317038
Cotete_3 30100170
Here is the desired output:
GERk0203078$ Levir Math
Cotete_1 84412351 (Value of Levir * Constant)/ constant
Cotete_2 39308596 (Value of Levir * Constant)/ constant
Cotete_3 39393962 (Value of Levir * Constant)/ constant

GERk0203040$ Levir
Cotete_1 37235657 (Value of Levir * Constant)/ constant
Cotete_2 84227986 (Value of Levir * Constant)/ constant
Cotete_3 30187827 (Value of Levir * Constant)/ constant

GERk0203050$ Levir
Cotete_1 37217582 (Value of Levir * Constant)/ constant
Cotete_2 30317038 (Value of Levir * Constant)/ constant
Cotete_3 3010017 (Value of Levir * Constant)/ constant

I started this script but not sure how to get the value from column Levir:
#a is the first constant
#b is the second constant
awk 'NR<=$a {print $1, $2, ("Math" )}' addcolumn > addcolumn.xls
expr ($Levir '*$a') / $b

Any help with that would be greatly appreciated.
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mlib_ImageConstMul_Fp(3MLIB)				    mediaLib Library Functions				      mlib_ImageConstMul_Fp(3MLIB)

mlib_ImageConstMul_Fp - multiply with a constant SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageConstMul_Fp(mlib_image *dst, const mlib_image *src, const mlib_d64 *c); DESCRIPTION
The mlib_ImageConstMul_Fp() function multiplies each pixel in a floating-point image by a constant value on a pixel-by-pixel basis. It uses the following equation: dst[x][y][i] = c[i] * src[x][y][i] PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src Pointer to source image. c Constant by which each pixel is multiplied. c[i] contains the constant for channel i. RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageConstMul(3MLIB), mlib_ImageConstMul_Fp_Inp(3MLIB), mlib_ImageConstMul_Inp(3MLIB), mlib_ImageConstMulShift(3MLIB), mlib_ImageCon- stMulShift_Inp(3MLIB), attributes(5) SunOS 5.10 10 Nov 2004 mlib_ImageConstMul_Fp(3MLIB)

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