You notice that no attempt has yet been made to simplify z. Z=y*x-8 % z is automatically another symbolic variable
Y=x^2-5/x % y is automatically another symbolic variable Enter the following and examine the output: The simplest way to enter “Maple” is to make one or more variables into symbolic symbol(s) using the syms command. The interface between Matlab and “Maple” is smooth and it is easy to move in and out of this Symbolic Math Toolbox. For convenience only in this guide we will refer to the smaller Symbolic Math Toolbox attached to Matlab as “Maple”. The tools in the Symbolic Math Toolbox are built upon the core of the powerful software program called Maple® which is used in many universities in Australia and overseas. You will be solving and computing with mathematical symbols rather than numbers. Each expression can be given a variable name (also symbolic) thereby allowing algebraic, trigonometric and other functional manipulations and simplifications as well as permitting differential and integral calculus. However, commands in the Symbolic Math Toolbox enable you to enter formulae such as sin(2*x), x*exp(x), x^2+3*atan(x), cos(x)^2+sin(x)^2, etc, where x is a symbolic variable. For example if you merely enter the single command sin(x) after the prompt you receive the error message A variable x must have a numerical value (or array values) before expressions involving x can then be evaluated. I'm not working on a student license either.In all previous sections of this introduction MATLAB has been used as a powerful programmable graphics calculator. I also realised that the documentation is always available when I take Help -> Product Help from the menu-bar, though it is not available in the function browser even after I try the sample code.ĮDIT-II > license('checkout','Symbolic_Toolbox') I'm not sure if this problem is just for this particular toolbox or not, but the other toolboxes I use at least seem to work fine. Some of them seem to blame it on MATLAB hashing the tollbox incorrectly, so I tried the rehash toolbox command as well, but had no luck.
I found a few instances of other users facing similar problems on the Mathworks portal, but none of them seemed to provide any concrete solutions. However, the problem again arises when I close and reopen MATLAB. The code works fine and on trying the help command again, they seem to work fine as well. Moreover, when I try some simple code such as: > syms k x However, the toolbox seems to be installed when I try the ver or pathtool command. Type "help help" for help command options, such as help for methods. Use the Help browser Search tab to search the documentation, or When I try to access any function in the 'Symbolic Math Toolbox' in MATLAB, such as help ztrans or help laplace, I get the following kind of message ztrans not found. This problem may seem a bit weird please bear with me.
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