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You can copy a variable from a MuPAD^{®} notebook to a variable
in the MATLAB^{®} workspace using a MATLAB command. Similarly,
you can copy a variable or symbolic expression in the MATLAB workspace
to a variable in a MuPAD notebook using a MATLAB command.
To do either assignment, you need to know the handle to the MuPAD notebook
you want to address.

The only way to assign variables between a MuPAD notebook and the MATLAB workspace is to open the notebook using the following syntax:

nb = mupad;

You can use any variable name for the handle `nb`.
To open an existing notebook file, use the following syntax:

nb = mupad(file_name);

Here * file_name* must be a full path
unless the notebook is in the current folder. The handle

To copy a symbolic variable in the MATLAB workspace to a variable in the MuPAD notebook engine with the same name, enter this command in the MATLAB Command Window:

setVar(notebook_handle,variable)

For example, if

`nb`is the handle to the notebook and`z`is the variable, enter:setVar(nb,z)

There is no indication in the MuPAD notebook that variable

`z`exists. To check that it exists, enter the command`anames(All, User)`in the notebook.To assign a symbolic expression to a variable in a MuPAD notebook, enter:

`setVar(notebook_handle,'variable',expression)`

at the MATLAB command line. For example, if

`nb`is the handle to the notebook,`exp(x) - sin(x)`is the expression, and`z`is the variable, enter:syms x setVar(nb,'z',exp(x) - sin(x))

For this type of assignment,

`x`must be a symbolic variable in the MATLAB workspace.Again, there is no indication in the MuPAD notebook that variable

`z`exists. Check that it exists by entering this command in the notebook:anames(All, User)

To copy a symbolic variable in a MuPAD notebook to a variable in the MATLAB workspace, enter in the MATLAB Command Window:

`MATLABvar = getVar(notebook_handle,'variable');`

For example, if

`nb`is the handle to the notebook,`z`is the variable in the MuPAD notebook, and`u`is the variable in the MATLAB workspace, enter:`u = getVar(nb,'z')`

Communication between the MATLAB workspace and the MuPAD notebook occurs in the notebook's engine. Therefore, variable

`z`must be synchronized into the notebook's MuPAD engine before using`getVar`, and not merely displayed in the notebook. If you try to use`getVar`to copy an undefined variable`z`in the MuPAD engine, the resulting MATLAB variable`u`is empty. For details, see Evaluate MuPAD Notebooks from MATLAB.

You can also copy and paste between notebooks and the MATLAB workspace using standard editing commands. If you copy a result in a MuPAD notebook to the system clipboard, you might get the text associated with the expression, or a picture, depending on your operating system and application support.

For example, consider this MuPAD expression:

Select the output with the mouse and copy it to the clipboard:

Paste this into the MATLAB workspace. The result is text:

exp(x)/(x^2 + 1)

If you paste it into Microsoft^{®} WordPad on a Windows^{®} system,
the result is a picture.

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