How do you do matrix math?

Hey all,

How can you develop a 3 x 3 matrix with elements ranging from 1 to 9. Then perform the calculation that Add 40 to it, divide element-wise by 7, subtract 2 from it, take the square root of the result then take the exponential of that. Do all thismath in one line of code.

[James Tursa]

What have you done so far? What specific problems are you having with your code?

[stozaki]

Hello Nicholas,

All of them are described in the document, so please refer to them.

• Creating, Concatenating, and Expanding Matrices
• Array vs. Matrix Operations
• sqrt
• exp

https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

https://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers

stozaki

[Walter Roberson]

See also magic()

[Nicholas Deosaran]

I have done this so far but I am stuck

d =[1 2 3; 4 5 6; 7 8 9]
d+(40)(./7)-2

[KSSV]

Read about BODMAS rules..

d =[1 2 3; 4 5 6; 7 8 9]
(d+40)/7-2

[Nicholas Deosaran]

Thank you,

I am stuck on the part on how to take the square root of that then that the expoential of it..

Answer 1

[KSSV]

Read about exp, sqrt. If A is my matrix, to get exp of sqrt, I will use.

iwant = exp(sqrt(A)) ;