Picking the right combination from the arrays

I have 4 arrays, two combinations of Nwell and Pwell voltages of Transistor 1 and Transistor 2

For transistor 1

vnw_1 =

0.00000 0.90000

vpw_1 =

-1.8000 -1.2000

So we define as (Vn, Vp) as (0.00000, -1.8000) and another (0.90000, -1.2000) these are the combination respectively.

for transistor 2

vnw_2 =

0.90000 0.00000

vpw_2 =

-1.20000 0.20000

Similarly we have (Vn, Vp) as (0.90000, -1.2000) and another (0.00000, 0.20000)

we can see that (0.90000, -1.2000) is common in T1 and T2.

I want to get the common voltage as the output

Answer (0.90000, -1.2000)

How do i do that? There is nothing linked to the concepts of transistors, just i need that combination as the output. How do i do that? Please help me

Answer 1

[David Hill]

Not sure how you are getting your data. Generally, you would not want to use so many variables but rather index into a single variable.

A=[vnw_1;vpw_1]';
B=[vnw_2;vpw_2]';
C=A(ismember(A,B,'rows'),:);

[Ganesh Kini]

It is not working , can you suggest one more solution.

[David Hill]

A=[0.00000 0.90000; -1.8000 -1.2000]';
B=[ 0.90000 0.00000; -1.20000 0.20000]';
C=A(ismember(A,B,'rows'),:);

Provides output:

C =

    0.9000   -1.2000

[Ganesh Kini]

vnw_1 = [0.00000, 0.90000];
vpw_1 = [-1.80000, -1.20000];

vnw_2 = [0.90000, 0.00000];
vpw_2 = [-1.20000, 0.20000];

A = [vnw_1; vpw_1];
B = [vnw_2; vpw_2];
C = A (ismember (A, B, 'rows' ), :);
disp (C)

i executed the code and this is the result

C =

0 × 2 empty double matrix

[David Hill]

A = [vnw_1; vpw_1]';%need ' since it is comparing rows
B = [vnw_2; vpw_2]';%need ' since it is comparing rows

[Stephen23]

To avoid floating point issues it would be more reliable to use ismembertol:

https://www.mathworks.com/help/matlab/ref/ismembertol.html

[Ganesh Kini]

Hi,

Thanks for all the suggestions, It works, But what if it has different dimensions ?

VNW1
  -0.20000  -0.20000
vpw1 =
  -0.90000  -1.80000
VNW2 =
   1.20000   0.30000   0.90000  -0.20000   1.20000
VPW2=
   0.00000  -1.20000  -0.90000   -1.80000  -0.30000

Could you please help ?

[Rik]

Please stop double-posting.

[Ganesh Kini]

@Rik Just wanted to know different approaches to solve the issue.

Thanks for the help it works fine