```
using Plots
x = collect(1:7)
y(x) = 2 - 2x + x^(2/4)
plot(1,2)
```

**LoadError**: LoadError: UndefVarError: _gr_seriestype not defined line 4

```
using Plots
x = collect(1:7)
y(x) = 2 - 2x + x^(2/4)
plot(1,2)
```

**LoadError**: LoadError: UndefVarError: _gr_seriestype not defined line 4

I can’t reproduce this error, can you post the output of `versioninfo()`

and your version of Plots.jl and GR.jl?

More generally, I’m not sure what you’re trying to achieve but if you’re trying to plot the function y(x) over the interval 1 to 7, you should do:

```
plot(x, [y(a) for a in x])
```

in your last line