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How can I repeat the code for multiple timesteps?

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Hi, I need to write a code to let a particle move multiple timesteps, where the timesteps can be any number (e.g. 2 or 50). The situation is the following, I have an array where a x-coordinate, an y-coordinate and the direction are in:
Q =
1 2 1
1 3 1
3 3 2
3 1 1
2 3 2
To make it easy, x and y can be 1, 2 or 3 and the direction can be 1 or 2. The direction I have defined as:
if Direction == 1 %If the direction ==1 then x stays equal but y becomes 1 higher
x = x
y = y + 1
if Direction == 2 %If the direction ==2 then y stays equal but x becomes 1 higher
x = x + 1
y = y
But how can i let this repeat for multiple time steps, because, like the code above is now, this should happen in one timestep where this timestep (dt) is set.

Accepted Answer

Walter Roberson
Walter Roberson on 26 Nov 2018
for stepnum = 1 : 100
.... your existing lines
Walter Roberson
Walter Roberson on 26 Nov 2018
It is a for loop. for acts like a repeated assignment statement.
You can use whatever variable name is convenient for your purposes. For example,
for timestep_number = 1 : 100
... your existing lines
You could also use
for time = 0 : 0.01 : 5
.... your existing lines
but in practice it is usually easier to iterate over step numbers than to iterate over times if you need to record data as you go along.

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