multiply a number to only a row in a matrix

• o =
• 3×16 logical array
• 1 1 0 0 1 1 1 0 1 0 1 1 1 1 0 1
• 0 0 1 0 1 0 1 0 1 1 1 0 1 1 1 0
• 1 1 0 1 0 0 1 1 0 1 1 0 0 0 0 1
• volts0 = ((-5 + 10*(out_data))*0.35)
• volts0 =
• Columns 1 through 12
• 1.7500 1.7500 -1.7500 -1.7500 1.7500 1.7500 1.7500 -1.7500 1.7500 -1.7500 1.7500 1.7500
• -1.7500 -1.7500 1.7500 -1.7500 1.7500 -1.7500 1.7500 -1.7500 1.7500 1.7500 1.7500 -1.7500
• 1.7500 1.7500 -1.7500 1.7500 -1.7500 -1.7500 1.7500 1.7500 -1.7500 1.7500 1.7500 -1.7500

I am trying to do the multiplication only on row1 but when I execute the syntax for volts0 it takes the entire matrix. How should I write this piece if I want to perform the multiplication only to row 1

Similarly i am trying to do for row 2 and 3 but with different numbers

please help

Answer 1

[madhan ravi]

volts0(1,:)*4 % here first row is multiplied by a scalar number like you wanted

[Panda Girl]

instead of the number 4 can I multiply with a random number ??

As the significance of the number 4 here is nothing but noise which is which distorts the signal and considering noise as a random variable I was trying to multiply a random number that would help me to respresent the problem statement more efficiently.

[madhan ravi]

just put rand(decimal value) or randi(integer value) in the place of 4

Answer 2

[perihane]

volts0(1,:)*4