To use fplot, you will need to create a function M-file, specifying the three parts of the function separately by using if statements. If you will need this function for further calculations, then use fplot command. function is not stored in easily accessible M-file,.must create a function M-file if it is not MATLAB in-build function.can easily create a graph using only two lines of code.function is stored in M-file for easy access (via handle) and modification.> Type in the following and decide which variables are symbolic. The syms command is actually a shortcut for the sym command. > Type in the following and see if you still get the same error message. However, if we make x a symbolic variable by using the syms x command, then we will be able to create and manipulate formulae without giving x a value first.
The reason for this error message is that you have not first given x a value. > Exercise: Introducing the Symbolic Toolbox Now we will start showing you how, using MATLAB Symbolic Toolbox, you can, not only solve equations, but also perform algebraic manipulations, such as differential and integral calculus like finding the derivative analytically.
Verify that rule i^2=-1 applies everywhere leaving no chance to the survival of any "i".įinally giving (I have set thetak=s^2 with s>0) : / / \Įrf| - | | | / (4 s)Įdit : You could have escaped integration.The past practicals have introduced MATLAB as a powerful programmable graphics calculator. This cancellation will occur at different places due to the fact that (-thetak)^(1/2) can be found : Indeed, taking the square root of a negative number will generate a "i" which in turn will "kill" the other "i"s that are "in contact" with it. Gives the impression that you have complex number i everywhere.īut in fact it is a false impression due to (-thetak)^(1/2). The answer you obtain (if you have a Matlab version similar to mine) and that I reproduce here : / / 2 \
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