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MATLAB (Pending (format long, Polynomials: [1 -1 -1], variable-precision…

- - - - One built-in function function is fplot, which plots a function between limits that are specified. The form of the call to fplot is:
        fplot(fnhandle, [xmin xmax])
        For example, to pass the sin function to fplot one would pass its handle:
        >> fplot(@sin, [-pi pi])
        The fplot function is a nice shortcut—it is not necessary to create x and y vectors, and it plots a continuous curve rather than discrete points.
      - The function feval will evaluate a function handle and execute the function for the specified argument.
        For example, the following is equivalent to sin(3.2):
        >> feval(@sin, 3.2) ans = −0.0584
      - The built-in function function cellfun evaluates a function for every element of a cell array. Its format is cellfun(FUN, C), where FUN is the handle to the functions that will be applied to each of the contents cells of the cell array C.
- - - - dbstop command will set a breakpoint in a line of a function or a script (preferably a line where for example the action of a clause is), which allows us to type variable names and/or expressions to examine their values at that point in the execution.
        Calling the function or the script then begins debug mode:
        >> dbstop in file_name at lne_number >> file_name([list of arguments]) K>> ...
      - dbcont command can be used to continue the execution.
      - dbquit command can be used to quit the debug mode.
- - - - One of them is called the Trapezoidal Rule. MATLAB has a built-in function trapz that will implement the trapezoidal rule. In these examples, straight lines that are first-order polynomials were used.
      - To use the built-in function trapz to accomplish the same thing, the x vector is created with the values 2, 3, and 4:
        >> x = 2:4; >> y = f(x) >> trapz(x,y) ans = 55