Not enough input arguments.

function [xi,w] = GaussInt2Pt()
xi = [-sqrt(1/3) sqrt(1/3)];
w = [1 1];
return;
end
function [N,B,Jac] = shapeQuadratic(x1,x2,x3,xi)
%%Le = x3- x1;        
N = (1/2)*[(-xi+xi^2) 2*(1-xi^2) (xi+xi^2)];
Jac = [(1/2)*(-1+2*xi) -2*xi (1/2)*(1+2*xi)]*[x1;x2;x3];
B = diff(N)/Jac;
return;
end

[Alexander Cordero]

I am new in matlab just wondering how to fix this problem . Thank you

[Alexander Cordero]

this is the Error screen

Not enough input arguments.

Error in SteadyHeatForStudents1>shapeQuadratic (line 358)
N = (1/2)*[(-xi+xi^2) 2*(1-xi^2) (xi+xi^2)];

Error in SteadyHeatForStudents1>element (line 283)
        [N,B,Jac] = shapeQuadratic(x1,x2,x3(intPt));

Error in SteadyHeatForStudents1 (line 141)
    [Ke,Fe] = element(nInt,nNode,nodeCoords,Area,Ktherm,source);

Answer 1

[dpb]

Looks disjointed in the error message but in

function [N,B,Jac] = shapeQuadratic(x1,x2,x3,xi)

there are four arguments required and your call above has only three...that would give rise to the error "not enough input arguments".

Simple example that can do at command line...

>> fn=@(x,y,z,xi) sum([x,y,z,xi]);  % define anonymous function needs four inputs
>> fn(1,2,3,4)                      % call with four arguments -- get expected
ans =
    10
>> fn(1,2,3)                        % try with only three...boom!
Not enough input arguments.
Error in @(x,y,z,xi)sum([x,y,z,xi]) 
>> 

The solution of the problem is simple--supply the additional needed input.

[Alexander Cordero]

Thank you sir. Amazing explanation .