Help on conditional statement
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From: gunther on 10 Jun 2010 11:02 Hello everybody, I want to call the function tone.m that produces a special beep sound conditional on statement A if A==1 tone.m else ??? end What do I have to write after 'else' to make Matlab no to call tone.m???? Or, is there another and better way to do this??? Many thanks Gunther
From: Oleg Komarov on 10 Jun 2010 11:09 "gunther " <forben(a)web.de> wrote in message <huqupb$nuf$1(a)fred.mathworks.com>... > Hello everybody, > > I want to call the function tone.m that produces a special beep sound conditional > on statement A > > if A==1 > tone.m > else > ??? > end > > What do I have to write after 'else' to make Matlab no to call tone.m???? > > Or, is there another and better way to do this??? > > Many thanks > Gunther Nothing. if A == 1; tone; end Oleg
From: Steven Lord on 10 Jun 2010 11:14 "gunther " <forben(a)web.de> wrote in message news:huqupb$nuf$1(a)fred.mathworks.com... > Hello everybody, > > I want to call the function tone.m that produces a special beep sound > conditional > on statement A > > if A==1 This will execute the body of the IF, assuming that ALL the elements of A are equal to 1. > tone.m This will not work; to call a function you need to either: * just use its name, like: tone; * or use its name followed by parentheses containing input arguments to be passed into the function: tone(); The code you wrote will attempt to treat tone as a struct array or object and retrieve the m field from that struct array or the m property of the object; if tone is neither of those types of variables, you will receive an error. > else > ??? > end > > What do I have to write after 'else' to make Matlab no to call tone.m???? Nothing. In fact, you don't even really need the ELSE block: if A == 1 tone; end But if you wanted to use the ELSE for whatever reason (like you were planning at some future time to insert some code) you could simply use nothing at all (or a comment explaining that you've inserted the ELSE for future expansion): if A==1 tone; else % leaving this empty for right now % TODO: fill in the code for the case where A is not 1 end -- Steve Lord slord(a)mathworks.com comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ To contact Technical Support use the Contact Us link on http://www.mathworks.com
From: Loren Shure on 10 Jun 2010 11:17 In article <huqupb$nuf$1(a)fred.mathworks.com>, forben(a)web.de says... > Hello everybody, > > I want to call the function tone.m that produces a special beep sound conditional > on statement A > > if A==1 > tone.m > else > ??? > end > > What do I have to write after 'else' to make Matlab no to call tone.m???? > > Or, is there another and better way to do this??? > > Many thanks > Gunther > First, you call tone.m by typing tone. Second, if A isn't 1, what do you want to have happen? Nothing? Then write this: if A == 1 tone end -- Loren http://blogs.mathworks.com/loren http://matlabwiki.mathworks.com/MATLAB_FAQ
From: Jan Simon on 10 Jun 2010 11:42
Dear Gunther! > I want to call the function tone.m that produces a special beep sound conditional > on statement A > > if A==1 > tone.m > else > ??? > end > > What do I have to write after 'else' to make Matlab no to call tone.m???? > Or, is there another and better way to do this??? At first I'd suggest to read the "Getting started" section of the documentation. Then "help if" gives some advices also. There is no specific command to let Matlab do nothing. But you can just omit the command at all! if A == 1 tone; % Without ".m" end Good luck and welcome to Matlab, Jan |