Adding a row of ones

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Renea Young
Renea Young on 20 Nov 2021
Commented: Renea Young on 21 Nov 2021
I want to add a row of ones to the first row of a=[1 2 3 4;5 6 7 8;9 10 11 12; 13 14 15 16]. This 4x4 will become 5x4. Any suggestions?

Accepted Answer

Atsushi Ueno
Atsushi Ueno on 20 Nov 2021
a = [1 2 3 4;5 6 7 8;9 10 11 12; 13 14 15 16];
b = [ones(1,size(a,2)); a]
b = 5×4
1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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