Elementwise addition operation in matrix or array

BD is 33*3 data.

BD=[ 1     0     0
    2   100    60
    3    90    40
    4   120    80
    5    60    30
    6    60    20
    7   200   100
    8   200   100
    9    60    20
    10    60    20
    11    45    30
    12    60    35
    13    60    35
    14   120    80
    15    60    10
    16    60    20
    17    60    20
    18    90    40
    19    90    40
    20    90    40
    21    90    40
    22    90    40
    23    90    50
    24   420   200
    25   420   200
    26    60    25
    27    60    25
    28    60    20
    29   120    70
    30   200   600
    31   150    70
    32   210   100
    33    60    40];
    
    BD(:,2)

ans = 33×1

0 100 90 120 60 60 200 200 60 60

I want to add data element wise in 2nd column and replace the data in BD.

Suppose addtion of 100 in BD (2,2) should update BD(2,2) to 200. Remaining column data should be as it is.

P(2)=100

BD(:,2) = BD (:,2)+_________

[Sanket Raval]

If I use scalar then scalar will be added to all the column value.

P(i) should be added to just in BD(i,2).

Answer 1

[David Hill]

If you are just adding a scalar to column 2 of BD

BD(:,2)=BD(:,2) + Scalar;

[David Hill]

If P is the same length as B, then

BD(:,2)=BD(:,2)+P;

If P is a different length

m=min(size(B,1),length(P));
BD(1:m,2)=BD(1:m,2)+P(1:m);

[Sanket Raval]

I updated your code:

Solution:1

P(2)=100;
m=min(size(BD,1),length(P));
BD(m,2)=BD(m,2)+P(1,m);

BD

Solution: 2

P=zeros(size(BD,1),1);
P(2)=100;
BD(:,2)=BD(:,2)+P;

BD

Thank you for idea.