problem.addrows
problem.addrows |
Purpose
Adds rows and their coefficient to the problem.
Synopsis
problem.addrows (qrtype, rhs, mstart, mclind, dmatval, range = None, names = None)
Arguments
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qrtype
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Character array containing the row types:
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rhs
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Array containing the right hand side elements.
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mstart
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Array containing the offsets in the
mclind and
dmatval arrays of the start of the elements for each row.
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mclind
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Array containing the (contiguous) column indices for the elements in each row.
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dmatval
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Array containing the (contiguous) element values.
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range
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(optional) Array containing the row range elements. Optional. The values in the range array will only be read for
R type rows. The entries for other type rows will be ignored.
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names
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(optional) Array of names to be assigned to each new row.
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Example
Suppose the current problem is:
Then the following adds the row 8x + 9y + 10z ≤ 25 to the problem and names it
NewRow:
| maximize: | 2x + y + 3z | ||
| subject to: | x + 4y + 2z | ≤ | 24 |
| y + z | ≤ | 5 | |
| 3x + y | ≤ | 20 | |
| x + y + 3z | ≤ | 9 |
p = xpress.problem ()
p.addrows (['L'], [25], None, [0,3], [0,1,2],
dmatval = [8, 9, 10], names = ['NewRow'])
Further information
Range rows are automatically converted to type
L, with an upper bound in the slack. This must be taken into consideration, when retrieving row type, right-hand side values or range information for rows.
Related topics