How to cut digits after the decimal point?

Hello, I have the following variable:

a1 = 0.1234

I want to cut all digits after the first one after the decimal point. Meaning:

a2 = 0.1

I've created the following code (q=1 in our example):

b1 = a1 .* 10^q;
b2 = floor(b1);
a2 = b2 ./ (10^q);

But, it output

a2 = 0.1000

How can I get rid of the zeros in the end?

Thank you.

Answer 1

[John D'Errico]

You can use

a2 = round(a1,1);

to round to that decimal point.

However, to display the number with no zeros, you may want to change your display format.

format short
a2
a2 =
    0.1000

format short g
a2
a2 =
          0.1

See the difference between short, and short g.

I tend to leave the display format as short g always, except for the rare time when I want to see more digits, then I move to long g.

[Mark Golberg]

Thank you!

[Deepthi B]

Can we save this variable in this format?

[ΦΨ]

Is there an option to cut not round? Meaning:

1.59 -> 1.5

[Dyuman Joshi]

@ΦΨ

format shortg

%input
in = 1.59;

%digits to cut
n = 1;

%output
out = floor(in*10^n)/10^n

out = 
          1.5

Answer 2

[Adam]

a2 = round( a1, 1 );

if you have a sufficiently recent version of Matlab. I can't remember when this functionality was added to the round function though.