readvars not a deifned function?

I keep getting the same error with readvars. Anyone know how to fix it?

[system, stiffness, time, mass] = readvars('hw4_q1.xlsx');

Undefined function or variable 'readvars'.

data table

1 10 4 10.9147000000000

2 8 8 11.1058000000000

3 2 1 10.4270000000000

4 5 5 11.3134000000000

5 3 4 11.1324000000000

6 5 2 10.6975000000000

7 9 0 10.9785000000000

8 10 1 11.3469000000000

9 20 3 11.8575000000000

10 11 20 11.9649000000000

[Daniel M]

What is the output of

which readvars

Answer 1

[Star Strider]

The readvars function was introduced in R2019a. If you are using R2018b or earlier, you will not be able to use it.

The solution is to upgrade to the current version, R2019b.