??? Attempted to access x(:,2); index out of bounds because numel(x)=1. Error in ==> testfunction at 38 A1 = sin(sqrt(a​bs(x(:,1)-​(x(:,2)+9)​)));

??? Attempted to access x(:,2); index out of bounds because numel(x)=1.

Error in ==> testfunction at 38 A1 = sin(sqrt(abs(x(:,1)-(x(:,2)+9))));

my function is

function [f] = testfunction(x)

x=2;

clc

funnum=16;

if funnum==1 %F1

f=abs(x)+cos(x);

elseif funnum==2 %F2

f=abs(x)+sin(x);

elseif funnum==3 %F3

f=x(:,1).^2+x(:,2).^2;

elseif funnum==4 %F4

f=100*(x(:,2).^2-x(:,1)).^2+(1-x(:,1)).^2;

elseif funnum==5 %F5

f(:,1)=sum(abs(x)-10*cos(sqrt(abs(10*x))));

elseif funnum==6 %F6

f=(x.^2+x).*cos(x);

elseif funnum==7 %F7

f=x(:,1).*sin(4*x(:,1))+1.1*x(:,2).*sin(2*x(:,2));

elseif funnum==8 %F8

f=x(:,2).*sin(4*x(:,1))+1.1*x(:,1).*sin(2*x(:,2));

elseif funnum==9 %F9

f(:,1)=x(:,1).^4+2*x(:,2).^4+randn(length(x(:,1)),1);

elseif funnum==10 %F10

f(:,1)=20+sum(x.^2-10*cos(2*pi*x));

elseif funnum==11 %F11

f(:,1)=1+sum(abs(x).^2/4000)-prod(cos(x));

elseif funnum==12 %F12

f(:,1)=.5+(sin(sqrt(x(:,1).^2+x(:,2).^2).^2)*5)./(1+.1*(x(:,1).^2+x(:,2).^2));

elseif funnum==13 %F13

aa=x(:,1).^2+x(:,2).^2;

bb=((x(:,1)+.5).^2+x(:,2).^2).^0.1;

f(:,1)=aa.^0.25.*sin(30*bb).^2+abs(x(:,1))+abs(x(:,2));

elseif funnum==14 %F14

f(:,1)=besselj(0,x(:,1).^2+x(:,2).^2)+abs(1-x(:,1)./10+abs(1-x(:,2))./10);

elseif funnum==15 %F15

f(:,1)=-exp(.2*sqrt((x(:,1)-1).^2+(x(:,2)*1).^2)+(cos(2*x(:,1))+sin(2*x(:,1))));

elseif funnum==16 %F16

    A1 = sin(sqrt(abs(x(:,1)-(x(:,2)+9))));

    B1 = sin(sqrt(abs(x(:,2)+0.5*x(:,1)+9)));

f(:,1)=x(:,1)*A1-(x(:,2)+9).* B1;

elseif funnum==17 %MOO function

x=x+1; f(:,1)=(x(:,1)+x(:,2).^2+sqrt(x(:,3))+1./x(:,4))./8.5;

f(:,2)=(1./x(:,1)+1./x(:,2)+x(:,3)+x(:,4))./6;

end

Answer 1

[Vishal Rane]

A switch-case construct will be more apt here.

Also the x variable is initialised as a scalar:

x = 2;

Whereas your code is assuming it to be a vector(matrix) and trying to access its 2nd column.

x(:,2)

[abida perveen]

now what to do with x how to initialize it