Can't draw a line error[E0271]

[Wanpaku]

I'm trying to draw a line with this function:

fn plot_accuracy(epochs: &u32, accuracy: &Vec<(u32, f64)>){
    let root_area = BitMapBackend::new("images/test_accuracy.png", (600, 400))
        .into_drawing_area();
    root_area.fill(&WHITE).unwrap();

    let mut ctx = ChartBuilder::on(&root_area)
        .set_label_area_size(LabelAreaPosition::Left, 40)
        .set_label_area_size(LabelAreaPosition::Bottom, 40)
        .caption("Test accuracy", ("sans-serif", 40))
        .build_cartesian_2d(0..epochs.to_owned(), 0..100)
        .unwrap();

     ctx.configure_mesh().draw().unwrap();
     ctx.configure_mesh().x_desc("Epochs");
     ctx.configure_mesh().y_desc("Test accuracy %");

    let series =  LineSeries::new(accuracy.iter().map(|(x, y)| (*x, *y)), &RED);
    ctx.draw_series(series).unwrap();

}

There appears the mistake:

error[E0271]: type mismatch resolving <RangedCoordi32 as Ranged>::ValueType == f64
--> src/mnist_conv.rs:80:9
|
80 | ctx.draw_series(series).unwrap();
| ^^^^^^^^^^^ expected i32, found f64

I don't understand how to rectify it.

[Wanpaku]

Mistake was here:

.build_cartesian_2d(0..epochs.to_owned(), 0..100)

I wrote Y axes as integer. It must be written as decimal (0.0...100.)