Call a function within an if statement

Hi all,

I'm writing an experiment and want 3 different types of tasks to be displayed in a random order and to repeat that 5 times but with a changing task order. I've written my tasks as functions (DensityInstruction, DirectionInstruction, SpeedInstruction) so as to call them in my script. The functions on their own are running smoothly, they are stored in the same folder as the script, and I made sure to provide all the necessary input.

If I'm running my script (see below), it's working until after the Shuffle (so I'm getting the randomtasks vector in my workspace) but it doesn't display my functions. It doesn't display any errors or warnings or anything... Any ideas as to why that may be and how to fix it?

try

task = [1 2 3];

ifi = 16.6;

for e = 1:5

randomtasks = Shuffle(task);

for n = 1:length(randomtasks)

if randomtasks==1

vblDensIns = DensityInstruction (ifi);

elseif randomtasks==2

vblDirIns = DirectionInstruction(ifi);

elseif randomtasks==3

vblSpeedIns = SpeedInstruction(ifi);

end

end

end

catch

Screen('CloseAll');

psychrethrow(psychlasterror);

end

Thanks so much in advance!!

Answer 1

[Jonas]

try

randomtasks(n)==1

i guess without the (n) you would compare a vector to a value e.g.

[1 3 2]==1

ans = 1×3 logical array
   1   0   0

which is not true and the if is not fullfilled

[Philine Baumert]

Thanks so much, it works now!