writebounds

Save description of variable bounds

Syntax

writebounds(var)

writebounds(var,filename)

Description

Use writebounds to save a description of the bounds on optimization variables.

Tip

For the full workflow, see Problem-Based Optimization Workflow or Problem-Based Workflow for Solving Equations.

writebounds(var) saves a description of the variable bounds in a file named variable_bounds.txt. Here, variable is the Name property of var. The writebounds function overwrites any existing file.

writebounds(var,filename) saves a description of the variable bounds in a file named filename.

Examples

Save Description of Bounds

Create an optimization variable and save its bounds to a file.

x = optimvar('x',10,4,'LowerBound',randi(8,10,4),...
    'UpperBound',10+randi(7,10,4),'Type','integer');
writebounds(x,'BoundFile.txt')

The contents of BoundFile.txt:

		7 <= x(1, 1) <= 14
		8 <= x(2, 1) <= 13
		2 <= x(3, 1) <= 16
		8 <= x(4, 1) <= 16
		6 <= x(5, 1) <= 12
		1 <= x(6, 1) <= 14
		3 <= x(7, 1) <= 14
		5 <= x(8, 1) <= 15
		8 <= x(9, 1) <= 15
		8 <= x(10, 1) <= 16
		2 <= x(1, 2) <= 12
		8 <= x(2, 2) <= 15
		8 <= x(3, 2) <= 15
		4 <= x(4, 2) <= 12
		7 <= x(5, 2) <= 11
		2 <= x(6, 2) <= 14
		4 <= x(7, 2) <= 17
		8 <= x(8, 2) <= 13
		7 <= x(9, 2) <= 15
		8 <= x(10, 2) <= 12
		6 <= x(1, 3) <= 16
		1 <= x(2, 3) <= 12
		7 <= x(3, 3) <= 14
		8 <= x(4, 3) <= 15
		6 <= x(5, 3) <= 17
		7 <= x(6, 3) <= 17
		6 <= x(7, 3) <= 14
		4 <= x(8, 3) <= 11
		6 <= x(9, 3) <= 12
		2 <= x(10, 3) <= 12
		6 <= x(1, 4) <= 16
		1 <= x(2, 4) <= 12
		3 <= x(3, 4) <= 16
		1 <= x(4, 4) <= 12
		1 <= x(5, 4) <= 17
		7 <= x(6, 4) <= 13
		6 <= x(7, 4) <= 12
		3 <= x(8, 4) <= 12
		8 <= x(9, 4) <= 15
		1 <= x(10, 4) <= 14

Input Arguments

var — Optimization variable

OptimizationVariable object

Optimization variable, specified as an OptimizationVariable object. Create var using optimvar.

Example: var = optimvar('var',4,6)

filename — Path to file

string | character vector

Path to the file, specified as a string or character vector. The path is relative to the current folder. The resulting file is a text file, so the file name typically has the extension .txt.

Example: "../Notes/steel_stuff.txt"

Data Types: char | string

Tips

• To obtain the writebounds information at the Command Window, use showbounds.

Version History

Introduced in R2017b