How to compare two variables data by using ifelse? if both variable contain same number and length of data, so condition becomes true it should perform desired functionality.

i want to establish a logic that if variable data is same as variable data "a" or "b'' or "c" or "d"then it should perform the listed functionality

i was trying the below code to get second elseif true and answer "Value==2" but when it first compare if data == a... it gives error >>>Matrix Dimension Must Agree"

a = -6:6;
b = -3:3;
c = 0:6;
d = 0:12;
% data = [-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6] % user selected
data = [-3 -2 -1 0 1 2 3]     % For this Data condition "Value = 2" should be answer
% data = [0 1 2 3 4 5 6]
% data = [0 1 2 3 4 5 6 7 8 9 10 11 12]
if data == a
    value =1
elseif data == b
    value = 2
elseif data == c
    value = 3
elseif data == d
    value = 4
end

it is giving error that "Matrix Dimesions Must Agree"

[Ameer Hamza]

If you only plot when 'b' and 'c' are equal to 'a', then are you trying to plot(a, a).

[taimour sadiq]

i apalojize i edited my question.. can u please review...

i want that variable "data" should b compared with variable a,b,c,d and see which comparison satisfy the condition

Answer 1

[KSSV]

Read about isequal.

a = -6:6;
b = -3:3;
c = 0:6;
d = 0:12;
% data = [-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6] % user selected
data = [-3 -2 -1 0 1 2 3]     % For this Data condition "Value = 2" should be answer
% data = [0 1 2 3 4 5 6]
% data = [0 1 2 3 4 5 6 7 8 9 10 11 12]
if isequal(data,a)
    value =1
elseif isequal(data,b)
    value = 2
elseif isequal(data,c)
    value = 3
elseif isequal(data,d)
    value = 4
end

But what you are trying to do.....what you are doing is not fine.

Answer 2

[Ameer Hamza]

data and a,b,c,d have different dimensions. Use isequal()

if isequal(data, a)
    value =1
elseif isequal(data, b)
    value = 2
elseif isequal(data, c)
    value = 3
elseif isequal(data, d)
    value = 4
end

Or the following more general approach

a = -6:6;
b = -3:3;
c = 0:6;
d = 0:12;
data = [-3 -2 -1 0 1 2 3];     % For this Data condition "Value = 2" should be answer

C = {a, b, c, d};
value = find(cellfun(@(x) isequal(data, x), C));