XPRSslpgetcoefstr
Purpose
Retrieve a single matrix coefficient as a formula in a character string. For a simpler version of this function see XPRSnlpgetformulastr.
Topic areas
Synopsis
int XPRS_CC XPRSslpgetcoefstr(XPRSprob prob, int row, int col, double *p_factor, char *formula, int maxbytes, int *p_nbytes);
Arguments
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prob
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The current SLP problem.
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row
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Integer holding the row index for the coefficient.
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col
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Integer holding the column index for the coefficient.
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p_factor
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Address of a double precision variable to receive the value of the constant factor multiplying the formula in the coefficient.
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formula
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Character buffer in which the formula will be placed in the same format as used for input from a file. This argument may be NULL if
maxbytes is zero.
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maxbytes
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Length of the
formula buffer.
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p_nbytes
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Will be set to the length of the formula, not including the null terminator.
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Example
The following example displays the formula for the coefficient of column 3 in row 2:
char *buffer;
double factor;
int len;
XPRSslpgetcoefstr(prob, 2, 3, &factor, NULL, 0, &len);
buffer = malloc(len + 1);
XPRSslpgetcoefstr(prob, 2, 3, &factor, buffer, len + 1, NULL);
printf("\nFormula is %s", buffer);
Further information
1. If the requested coefficient is constant, then
p_factor will be set to 1 and the value will be formatted in
formula.
2. If the length of the formula would exceed
maxbytes-1, the formula is truncated to the last token that will fit, and the (partial) formula is terminated with a null character.
Related topics
XPRSnlpgetformulastr,
XSLPaddformulas,
XPRSnlpchgformulastr,
XSLPchgformula,
XSLPloadformulas,
XSLPgetformularows,
XSLPgetformula,
XSLPdelformulas
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