In MATLAB, a for loop is a control structure that allows you to repeat a specific block of code several times. The syntax for a for loop in MATLAB is:
for loop_variable = start_value:increment:end_value % code to be executed end
loop_variable is a variable that is used to count the number of iterations of the loop. It starts at
start_value and increments by
increment each time the loop runs, until it reaches
For example, consider the following for loop:
for i = 1:2:9 disp(i) end
This loop will execute the code inside the loop body (
disp(i)) four times, with
i taking on the values 1, 3, 5, and 7. The output will be:
1 3 5 7
You can use any variable name for the loop variable, and you can specify any start, increment, and end values you like. You can also nest for loops inside each other to perform more complex operations.
It is important to note that in MATLAB, the increment value must be a scalar (a single number). You cannot use a vector or an array as the increment value. Additionally, the end value must be reachable by adding multiples of the increment value to the start value. If this is not the case, the loop will not execute at all.
- To programmatically exit the loop, use a
breakstatement. To skip the rest of the instructions in the loop and begin the next iteration, use a
- Avoid assigning a value to the
indexvariable within the loop statements. The
forstatement overrides any changes made to
indexwithin the loop.
- To iterate over the values of a single column vector, first transpose it to create a row vector.