Index in position 2 exceeds array bounds (must not exceed 1) ??

Why does the following function produce the error "Index in position 2 exceeds array bounds (must not exceed 1)"?

function test2

close all

prompt ={'Enter the x1 value: ','Enter the y1 value: ','Enter the x2 value: ','Enter the y2 value: '};
Is = inputdlg(prompt); 
Is = str2double(Is);

%Eucleidan distance

D = sqrt((Is(1,2)-Is(1,1))^2 + (Is(1,4)-Is(1,3))^2);

fprintf ('the distance value obtained is %d',D)

end

Answer 1

[Guillaume]

The error occurs because the vector “Is” is a 4-by-1 column vector (not a 1-by-4 row vector) so that the valid element positions are (1,1), (2,1), (3,1), and (4,1). If you try to access any index value beyond 1 in the 2nd position, you will encounter the error.

[Kaleesh Bala]

Yup! sorry, it was assumed to be a row vector. Now it works fine!

function test2

close all

prompt ={'Enter the x1 value: ','Enter the y1 value: ','Enter the x2 value: ','Enter the y2 value: '};

Is = inputdlg(prompt);

Is = str2double(Is);

fprintf('the value of Is %d',Is)

%Eucleidan distance

D = hypot(Is(3)-Is(1), Is(4)-Is(2));

fprintf ('the distance value obtained Dis %d',D)

end

Answer 2

[sachin bharadwaj]

Index in position 2 exceeds array bounds (must not exceed 1).

Error in fatlabexam (line 17)

g=PP(:,1)*h(1)+PP(:,2)*h(2);

why is it showing error?