Description
Runs a number of tests on the numeric array x. Tests to see if x has all integer values, all positive values, and so on, depending on the values for intFlag and signFlag. Also tests to see if the size of x matches size (unless size==[]). If x is a scalar, x is converted to a array simply by creating a matrix of size size with x in each entry. This is why the function returns x. size=M is equivalent to size=[M M]. If x does not satisfy some criteria, an error message is returned in er. If x satisfied all the criteria er=”.
function [ x, er ] = checkNumArgs( x, siz, intFlag, signFlag ) xname = inputname(1); er=''; if( isempty(siz) ); siz = size(x); end; if( length(siz)==1 ); siz=[siz siz]; end; % first check that x is numeric if( ~isnumeric(x) ); er = [xname ' not numeric']; return; end; % if x is a scalar, simply replicate it. xorig = x; if( length(x)==1); x = x(ones(siz)); end; % regardless, must have same number of x as n if( length(siz)~=ndims(x) || ~all(size(x)==siz) ) er = ['has size = [' num2str(size(x)) '], ']; er = [er 'which is not the required size of [' num2str(siz) ']']; er = createErrMsg( xname, xorig, er ); return; end % check that x are the right type of integers (unless intFlag==-1) switch intFlag case 0 if( ~all(mod(x,1)==0)) er = 'must have integer entries'; er = createErrMsg( xname, xorig, er); return; end; case 1 if( ~all(mod(x,2)==1)) er = 'must have odd integer entries'; er = createErrMsg( xname, xorig, er); return; end; case 2 if( ~all(mod(x,2)==0)) er = 'must have even integer entries'; er = createErrMsg( xname, xorig, er ); return; end; end; % check sign of entries in x (unless signFlag==0) switch signFlag case -2 if( ~all(x<0)) er = 'must have strictly negative entries'; er = createErrMsg( xname, xorig, er ); return; end; case -1 if( ~all(x<=0)) er = 'must have negative entries'; er = createErrMsg( xname, xorig, er ); return; end; case 1 if( ~all(x>=0)) er = 'must have positive entries'; er = createErrMsg( xname, xorig, er ); return; end; case 2 if( ~all(x>0)) er = 'must have strictly positive entries'; er = createErrMsg( xname, xorig, er ); return; end end function er = createErrMsg( xname, x, er ) if(numel(x)<10) er = ['Numeric input argument ' xname '=[' num2str(x) '] ' er '.']; else er = ['Numeric input argument ' xname ' ' er '.']; end https://matlab1.com/shop/matlab-code/transform-rotation-matrix-into-rotation-vector-and-viceversa/
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