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Full Discussion: Atan2 function in awk
Top Forums Shell Programming and Scripting Atan2 function in awk Post 302813947 by Fredrick on Tuesday 28th of May 2013 12:15:32 PM
Old 05-28-2013
Atan2 function in awk

Hello All,

I need your help in the following situation. I have a 100x100 matrix with angle values ranging from -180 to 180. I would like to calculate the atan2 values for the above mentioned matrix, and the output should be in the same format (100x100 matrix).

I tried the following code:

Code:
awk '{for(i=1; i<=NF; i++) {s=s FS atan2($i)} print s;s=""}' input > output

But, I got the following error:

Code:
^1 is invalid as number of arguments for atan2

Could anyone help me in this regard? Expecting your replies and thanks in advance.

Warm regards
Fredrick.
 

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GLROTATE(3G)															      GLROTATE(3G)

NAME
glRotated, glRotatef - multiply the current matrix by a rotation matrix C SPECIFICATION
void glRotated( GLdouble angle, GLdouble x, GLdouble y, GLdouble z ) void glRotatef( GLfloat angle, GLfloat x, GLfloat y, GLfloat z ) PARAMETERS
angle Specifies the angle of rotation, in degrees. x, y, z Specify the x, y, and z coordinates of a vector, respectively. DESCRIPTION
glRotate produces a rotation of angle degrees around the vector (x,y,z). The current matrix (see glMatrixMode) is multiplied by a rotation matrix with the product replacing the current matrix, as if glMultMatrix were called with the following matrix as its argument: x2(1-c)+c xy(1-c)-zs xz(1-c)+ys 0 (yx(1-c)+zs y2(1-c)+c yz(1-c)-xs 0) xz(1-c)-ys yz(1-c)+xs z2(1-c)+c 0 0 0 0 1 Where c=cos(angle), s=sin(angle), and ||(x,y,z)||=1 (if not, the GL will normalize this vector). If the matrix mode is either GL_MODELVIEW or GL_PROJECTION, all objects drawn after glRotate is called are rotated. Use glPushMatrix and glPopMatrix to save and restore the unrotated coordinate system. NOTES
This rotation follows the right-hand rule, so if the vector (x,y,z) points toward the user, the rotation will be counterclockwise. ERRORS
GL_INVALID_OPERATION is generated if glRotate is executed between the execution of glBegin and the corresponding execution of glEnd. ASSOCIATED GETS
glGet with argument GL_MATRIX_MODE glGet with argument GL_COLOR_MATRIX glGet with argument GL_MODELVIEW_MATRIX glGet with argument GL_PROJECTION_MATRIX glGet with argument GL_TEXTURE_MATRIX SEE ALSO
glMatrixMode(3G), glMultMatrix(3G), glPushMatrix(3G), glScale(3G), glTranslate(3G) GLROTATE(3G)
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