How to do simple if statement without using if

Another silly question, this is a small part of a bigger overall homework problem I've been having, but if I have a situation where I want to say:

if (x>y)

~~~~

end

is there a way of doing that without using an if statement? Appreciate any help!

[Mischa Kim]

Depends. What is between the if-end?

Answer 1

[Star Strider]

I have no idea what you want to do, but something like this could work:

z = (x.*y) .* (x>y)

It uses implicit logical indexing, so for x<=y, ‘z’ is 0 since (x>y) is 0 (false), and for x>y, ‘z’ is x.*y, since x>y is 1 (true).

Experiment with it with your code to get the result you want.

[wakakami]

Appreciate the help! I'm probably being dumb, but my situation is:

If x < y, then I want z to equal x. But if x > y, then I want z = x-y.

So I think the above solution is impossible for this particular situation, since I don't want z to = 0 in cases where x<y?

[Star Strider]

My pleasure!

Not impossible at all:

z = x.*(x<y) + (x-y).*(x>y);

This leaves undefined x==y, that would be zero.

You can also create an anonymous function version:

z = @(x,y) x.*(x<y) + (x-y).*(x>y);

to use anywhere in your script, just as you would any other function.

Answer 2

[Image Analyst]

Use while:

temp = x
while (x>y)
   ~~~~
   x = y-1; % Force exit of while loop
end
% Restore x to original value
x = temp;

But why not simply use "if"? What's wrong with if???

Answer 3

[yahya naja]

can anyone help i can do it with if but how to do it without it

[Image Analyst]

I don't know how they get $11.75. I get $11.56. Here is how you'd do it:

w = 2.25
d = 3.5
distanceBeyond1 = ceil(d - 1) % Remaining distance
theFare = round(5 + 2 * distanceBeyond1 + w * 0.25, 2)

You can see that you have $5 for the first 1 km, leaving 2.5 km left. But you count any part of a km as a full km, so the remaining distance gets rounded up to 3 with ceil(). At $2 per km, that is $2*3 = $6 for the distance between 1 and 3.5 km, so now we have $11 so far. Then the wait cost is 2.25 * $0.25 = $0.5625. Adding up you get $5 + $6 + $0.56 = $11.56.

[yahya naja]

thanks anyway i will use your logic and try to modify it

[Image Analyst]

If you figure out how they got $11.75 instead of $11.56, let us know because I'm just not seeing it. Maybe they did something they didn't state, like the price gets rounded up to the nearest $0.25 or something.