Name: PGCONB Purpose: contour map of a 2D data array, with blanking Category: GRAPHICS File: pgplot.src Author: T.J. Pearson Use: see description below. Description: SUBROUTINE PGCONB (A, IDIM, JDIM, I1, I2, J1, J2, C, NC, TR, 1 BLANK) INTEGER IDIM, JDIM, I1, I2, J1, J2, NC REAL A(IDIM,JDIM), C(*), TR(6), BLANK Draw a contour map of an array. This routine is the same as PGCONS, except that array elements that have the "magic value" defined by argument BLANK are ignored, making gaps in the contour map. The routine may be useful for data measured on most but not all of the points of a grid. Arguments: A (input) : data array. IDIM (input) : first dimension of A. JDIM (input) : second dimension of A. I1,I2 (input) : range of first index to be contoured (inclusive). J1,J2 (input) : range of second index to be contoured (inclusive). C (input) : array of contour levels (in the same units as the data in array A); dimension at least NC. NC (input) : number of contour levels (less than or equal to dimension of C). The absolute value of this argument is used (for compatibility with PGCONT, where the sign of NC is significant). TR (input) : array defining a transformation between the I,J grid of the array and the world coordinates. The world coordinates of the array point A(I,J) are given by: X = TR(1) + TR(2)*I + TR(3)*J Y = TR(4) + TR(5)*I + TR(6)*J Usually TR(3) and TR(5) are zero - unless the coordinate transformation involves a rotation or shear. BLANK (input) : elements of array A that are exactly equal to this value are ignored (blanked). Updates: Oct 16, 1998: JPT automatically extracted from source.