matlab figure函数的用法

ChanMon:

function tf = opttf(pval,okarg)

%OPTTF determines whether PVAL are true or false

% TF = OPTTF(PVAL, OKARG) evaluates the value PVAL of OKARG for logical

% TF and errors if the intended valus is invalid.

% Copyright 2003-2012 The MathWorks, Inc.

if islogical(pval)

tf = all(pval);

return

end

if isnumeric(pval)

tf = all(pval~=0);

return

end

if ischar(pval)

truevals = {'true','yes','on','t'};

k = any(strcmpi(pval,truevals));

if k

tf = true;

return

end

falsevals = {'false','no','off','f'};

k = any(strcmpi(pval,falsevals));

if k

tf = false;

return

end

end

if nargin == 1

% return empty if unknown value

tf = logical([]);

else

okarg(1) = upper(okarg(1));

m = message('stats:opttf:OptionNotLogical',upper(okarg));

throwAsCaller(MException(m.Identifier,'%s',getString(m)));

end