## How do you iterate through a matrix in Matlab?

Read about logical indexing:

- Matrix = [20,5; 30, -6; 40,8; 50,10];
- for i = 1:size(Matrix,1)
- if Matrix(i,1)<0 || Matrix(i,2)<0.
- disp(‘neg’)
- elseif Matrix(i,1)>0 && Matrix(i,2)>0.
- % some function.
- end.
- end.

### How do you iterate through a matrix?

In order to loop over a 2D array, we first go through each row, and then again we go through each column in every row. That’s why we need two loops, nested in each other. Anytime, if you want to come out of the nested loop, you can use the break statement.

**How do you iterate in Matlab?**

Use the up-arrow key, followed by the enter or return key, to iterate, or repeatedly execute, this statement: x = sqrt(1 + x) Here is what you get when you start with x = 3.

**How do you iterate a vector in Matlab?**

MATLAB Language For loops Iterate over elements of vector The for loop assigns a different element of this vector to the variable each run. (The 1:n version is a normal case of this, because in Matlab 1:n is just syntax for constructing a row vector of [1, 2., n] .) Any row vector will do.

## Which is an example of iteration in MATLAB?

Iteration is a key element in much of technical computation. Examples involving the Golden Ratio introduce the Matlab assignment statement, for and while loops, and the plot function. Start by picking a number, any number. Enter it into Matlab by typing x = your number. This is a Matlab assignment statement.

### How to insert rows into a matrix in MATLAB?

Here row = 5and then column = 3and for hence two for loop. Put the value in M(i, j)location and it will insert the value in the matrix for i=1:5 for j=1:3 M(i, j) = input(‘Enter a value = ‘) end fprintf(‘Row %d inserted successfully ‘, i) end disp(‘Full Matrix is = ‘) disp(M)

**Which is the simplest while loop in MATLAB?**

Here is the simplest while loop for our ﬁxed point iteration. x = 3 while x ~= sqrt(1+x) x = sqrt(1+x) end This produces the same 32 lines of output as the for loop. However, this code is open to criticism for two reasons. The ﬁrst possible criticism involves the termi- nation condition. The expression x ~= sqrt(1+x) is the Matlab way of writing

**How many lines of output does iteration produce?**

Iteration produces 32 lines of output, one from the initial statement and one more each time through the loop. A while loop executes a block of code an unknown number of times. Termi- nation is controlled by a logical expression, which evaluates to true or false.