How to use tan(X) in matlab

f_f0=(0:0.1:5)'
Bl=(pi/2)*f_f0
v=tan(Bl)

In this coding, values of 'v' are all '0'.

I don't know where this coding was wrong.

Please help.

[Torsten]

Try

f_f0=0:0.1:0.5

[Jongmin Paik]

I must try f_f0=0:0.1:5

I can't change this line.

sorry...

[Jongmin Paik]

why trying 0:0.1:0.5 is operate nomally?

[Torsten]

tan(x) has singularities at pi/2, 3/2*pi, ...

[Jongmin Paik]

You say trying '0:0.1:5' was wrong..

Then How to use tangent for 0:0.1:5?

[Torsten]

No, not wrong, but the difference in magnitude of thenumbers of the output is large.

You will haveto change the output format.

Answer 1

[Walter Roberson]

Give the command

format long g

and display v again.

The values in v are not 0: they are only 0 to 5 decimal places compared to the "1.0e+16 *" that you did not happen to notice at the top of your display of the content of v.

I recommand that you go into Preferences and permanently modify the preferred output format to be "long g"

[Jongmin Paik]

Thanks for your helping!!

I want to know that 'long g' means.

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/format.html#btiwmh5-3

longG: Long, fixed-decimal format or scientific notation, whichever is more compact, with a total of 15 digits for double values, and 7 digits for single values.