not enough input arguments error

function T = trans( a, d,alpha, theta)
%Describing the Denavit-Hartenberg parameters
T =[cosd(theta) -(sind(theta)) 0 a;
sind(theta)*cosd(alpha) cosd(theta)*cosd(alpha) -sind(alpha) -d*sind(alpha);
sind(theta)*sind(alpha) sind(alpha)*cosd(theta) cosd(alpha) d*cosd(alpha);
0 0 0 1 ];
end

at line 3 im getting not enough input arguments

Answer 1

[Geoff Hayes]

sudheer - if you are calling this function from the command line (or another piece of code) as simply

trans

then you will get this error. The function signature

function T = trans( a, d,alpha, theta)

is telling you that you need to provide four input paramters: a, d, alpha and theta. And so the function should be called like

trans(1,0.5,45,-74)

The above inputs are for example only...I don't know what the units for the inputs should be.

[sudheer yadav]

I tried it showing same error

[Geoff Hayes]

sudheer - you will need to show the code that you are using and the full error message.

[Steven Lord]

Can you show us exactly how you're calling your function and the full and exact text of the error message you receive (all the text displayed in red, and if there is any all the text displayed in orange) when you try to call it?

[sudheer yadav]

function T = trans( a, d,alpha, theta)
T =[cosd(theta) -(sind(theta)) 0 a;
sind(theta)*cosd(alpha) cosd(theta)*cosd(alpha) -sind(alpha) -d*sind(alpha);
sind(theta)*sind(alpha) sind(alpha)*cosd(theta) cosd(alpha) d*cosd(alpha);
0 0 0 1 ];
end

the above one is the function im calling

the error message in command line is

Not enough input arguments.

Error in Romat (line 2)

T =[cosd(theta) -(sind(theta)) 0 a;

[Walter Roberson]

I do not observe any error when used in the manor that Geoff suggested.

trans(1,0.5,45,-74)

ans = 4×4

0.2756 0.9613 0 1.0000 -0.6797 0.1949 -0.7071 -0.3536 -0.6797 0.1949 0.7071 0.3536 0 0 0 1.0000

function T = trans( a, d,alpha, theta)
T =[cosd(theta) -(sind(theta)) 0 a;
sind(theta)*cosd(alpha) cosd(theta)*cosd(alpha) -sind(alpha) -d*sind(alpha);
sind(theta)*sind(alpha) sind(alpha)*cosd(theta) cosd(alpha) d*cosd(alpha);
0 0 0 1 ];
end