Basics of MATLAB and Beyond

33 ! 36 $ 39 ’ 42 * 45 - 48 034 " 37 % 40 ( 43 + 46 . 49 135 # 38 & 41 ) 44 , 47 / 50 2Typing char(7) rings the bell.Exercise 9 (Page 80)The strvcat function is used instead of char because it ignores emptystrings in the input; the char function doesn’t:>> char(’’,’The’,’’,’quick’)ans =Thequick>> strvcat(’’,’The’,’’,’quick’)ans =ThequickIf char were used instead of strvcat, the result would always begin witha blank line.Exercise 10 (Page 83)The problem is to deal with the two cases: (1) where the name of afunction or m-file is given, such as ‘sin’, and (2) where the function itselfis given, such as ‘sin(x)’. The difference here boils down to whetherthe string input contains brackets or not (see hint). In other cases thestring input might not contain brackets, but would contain charactersused in defining a function, such as +, -, *, /, or. (as in t.^2). Theascii values for these characters are all less than 48, so we detect thepresence of a function (rather than a function name) by checking theinput string for ascii values less than 48. If this is the case, we makethe input string into an inline function before passing it to feval:function funplot(f,lims)% Simple function plotter.% Test for characters whose presence would imply that f% is a function (not a function name):if any(f