Determine equality - MATLAB eq == (2024)

Open Live Script

A = [1+i 3 2 4+i];B = [1 3+i 2 4+i];A == B

ans = 1x4 logical array 0 0 1 1

Open Live Script

M = 'magenta';

M == 'e'

ans = 1x7 logical array 0 0 0 1 0 0 0

Open Live Script

A = categorical({'heads' 'heads' 'tails'; 'tails' 'heads' 'tails'})

A = 2x3 categorical heads heads tails tails heads tails 

A == 'heads'

ans = 2x3 logical array 1 1 0 0 1 0

A(1,:) == A(2,:)

ans = 1x3 logical array 0 1 1

Open Live Script

C = 0.5-0.4-0.1

C = -2.7756e-17

C == 0

ans = logical 0

tol = eps(0.5);abs(C-0) < tol

ans = logical 1

Open Live Script

t1 = [2014,04,14,9,0,0;2014,04,14,10,0,0];A = datetime(t1,'TimeZone','America/Los_Angeles');A.Format = 'd-MMM-y HH:mm:ss Z'

A = 2x1 datetime 14-Apr-2014 09:00:00 -0700 14-Apr-2014 10:00:00 -0700

t2 = [2014,04,14,12,0,0;2014,04,14,12,30,0];B = datetime(t2,'TimeZone','America/New_York');B.Format = 'd-MMM-y HH:mm:ss Z'

B = 2x1 datetime 14-Apr-2014 12:00:00 -0400 14-Apr-2014 12:30:00 -0400

A==B

ans = 2x1 logical array 1 0

Open Live Script

A = table([1;2],[3;4],VariableNames=["V1","V2"],RowNames=["R1","R2"])

A=2×2 table V1 V2 __ __ R1 1 3 R2 2 4 

B = table([4;2],[3;1],VariableNames=["V2","V1"],RowNames=["R2","R1"])

B=2×2 table V2 V1 __ __ R2 4 3 R1 2 1 

A == B

ans=2×2 table V1 V2 _____ _____ R1 true false R2 false true 

• If one input is a categorical array, the other input can be a categorical array, a cell array of character vectors, or a single character vector. A single character vector expands into a cell array of character vectors of the same size as the other input. If both inputs are ordinal categorical arrays, they must have the same sets of categories, including their order. If both inputs are categorical arrays that are not ordinal, they can have different sets of categories. See Compare Categorical Array Elements for more details.

• If one input is a datetime array, the other input can be a datetime array, a character vector, or a cell array of character vectors.

• If one input is a duration array, the other input can be a duration array or a numeric array. The operator treats each numeric value as a number of standard 24-hour days.

• If one input is a string array, the other input can be a string array, a character vector, or a cell array of character vectors. The corresponding elements of A and B are compared lexicographically.

• If an input is a table or timetable, then all its variables must have data types that support the operation.

• If only one input is a table or timetable, then the other input must be a numeric or logical array.

• If both inputs are tables or timetables, then:

  • Both inputs must have the same size, or one of them must be a one-row table.

  • Both inputs must have variables with the same names. However, the variables in each input can be in a different order.

  • If both inputs are tables and they both have row names, then their row names must be the same. However, the row names in each input can be in a different order.

  • If both inputs are timetables, then their row times must be the same. However, the row times in each input can be in a different order.