Question

excluding a small combinations from a combination?

Hello. Would you please explain how to exclude combinations including "2,4,6" from combinations of from fourth combination of t...

2 months ago | 2 answers | 0

Question

how to multiple successive numbers?

Would you please show how to multiply the number from 70 to 80 successively without entering them by one by?

2 months ago | 1 answer | 0

Question

showing roots of an equation

Would you please explain what is wrong with this operation? I entered an equation as a string and then assigned it to a variabl...

3 months ago | 1 answer | 0

Question

the use of fplot function

Would you please help me plot the function x^2 between [-2,2]? This does not work, and would you please explain why that does ...

3 months ago | 1 answer | 0

Question

the use of the text function.

Can I name the functions using the function text, or any other, in one step? x:0:pi/40:4*pi; plotyy(x, sin(x), x, cos(2*x))...

3 months ago | 1 answer | 0

Question

use of built in functions; manipulating data arrays

Would you please explain when this works >> d = [1, 2, 3; 4, 5, 6]; f = size(d) f = 2 3 >> [rows,cols] = si...

3 months ago | 1 answer | 0

Question

solving sin(x) by solve commad?

When I write this command solve(sin(x)), why is the result 0? What is the meaning of this operation? Can I solve it for 0:10? ...

3 months ago | 1 answer | 0

Answered

The expression to the left of the equals sign is not a valid target for an assignment

The reference is quite difficult for me to understand. I am someone with no background of data structures. Would you please exp...

The expression to the left of the equals sign is not a valid target for an assignment

The reference is quite difficult for me to understand. I am someone with no background of data structures. Would you please exp...

3 months ago | 0

Question

The expression to the left of the equals sign is not a valid target for an assignment

both x and y has been introduced by syms. This seems to me perfectly correct. What is wrong here? >> solve(5*x + 4*y = 3, x...

3 months ago | 2 answers | 0

Answered

the use of ezplot function

But what is the diffence between syms x d = x^2 - 6*x - 12; figure ezplot(d) and syms x d = x^2 - 6*x - 12; fi...

the use of ezplot function

But what is the diffence between syms x d = x^2 - 6*x - 12; figure ezplot(d) and syms x d = x^2 - 6*x - 12; fi...

3 months ago | 0

Question

the use of ezplot function

Would you please explain the use of ezplot function. Why it is giving a warning in this case? Thanks >> d d = 'x^2 ...

3 months ago | 2 answers | 0

Answered

solving algebraic equations and characteristic vectors

How many times should I enter syms command? In every new equation?

solving algebraic equations and characteristic vectors

How many times should I enter syms command? In every new equation?

3 months ago | 0

Question

solving algebraic equations and characteristic vectors

I am very new in matlab. I am struggling with warnings when I am trying to solve algebraic equaions. Would you please help me un...

3 months ago | 3 answers | 0

Question

the use of eye command?

Would you please explain the meaning of this use of eye command? >>eye (2,4) ans= 1 0 0 0 0 1 0 0 Thank...

3 months ago | 1 answer | 0

Question

what is the meaning of this operation?

If you have a matrix d=[1 2 3 4; 5 6 7 8 9; 10 11 12 13]; what is the meaning of d(1 2) and d([1 2]) Thank you.

3 months ago | 3 answers | 0

Question

A strange result with vectors

When I create 1:3:5 matlab turns 1 4, a row matrix. why does matlab ignores .* between two vectors? 1:3:5 .* 1:3:5 turns o...

3 months ago | 1 answer | 0

Question

1x0 emtpy double row vector?

What does 1x0 empty double row vector mean? When I do this operation 0:0.1, matlab turns 0 as a result. But why does 1:0...

3 months ago | 2 answers | 0

Answered

creating a new matrix from an obtained matix?

Thank you Alan Stevens but what If I wanted 2s, or twos, as the first column instead of 0s, or zeros, as the last one?

creating a new matrix from an obtained matix?

Thank you Alan Stevens but what If I wanted 2s, or twos, as the first column instead of 0s, or zeros, as the last one?

6 months ago | 0

Question

creating a new matrix from an obtained matix?

Hello. If I already have a matrix [1 2 3; 4 5 6; 7 8 9], how can I add 0 to its every row by a command? Thank you.

6 months ago | 2 answers | 0

Question

calculating and writing sorted results in matlab

Would you please explain how to write sorted results to a txt file? For example if you have (0, 2, 4, 6, 8) and (1, 3, 5, 7,...

10 months ago | 1 answer | 0

Question

what is fileID in matlab?

I have no experience in programming. Would you please explain what "fileID" is in general and for specifically in Matlab? Wha...

10 months ago | 1 answer | 0

Question

invisible bits of large results

Hello, I wish to calculate possible 10-letter words that could be created from English alphabet. This is just a try. I consider...

11 months ago | 1 answer | 0