Question: I have several data frames and want to process them in a loop. So I try to call the frames using a variable containing the name of the frame. How can I use a variable to address a data frame? Or in general the content of a variable as an expression?

```
# 38 data frames all named ExperimentX, with X 1:38
for(i in 1:38) {
  nextDataFrame <- paste0("Experiment",i)
  Collection$paste0("Experiment",i) <- nextDataFrame
}

```

I understand why this code doesn't work, but I have no idea how to do this in another way. Same problem with `ggplot`, where I would like to call nextExperiment in `geom_line()`, fails with the error 

> 
> ggplot2 doesn't know how to deal with data of class character.
> 
> 
> 

How do I tell it to use as expression what the expression is pointing to?

```
Plot1 <- ggplot()
ToDo <- c(1, 5, 3) # specifies dataframes to plot
counter <- length(ToDo)
while (counter!=0) {
  NumberOfDataframe <- ToDo[counter]
  nextExperiment <- paste0("Experiment", NumberOfDataframe)
  Plot1 + geom_line(data = nextExperiment, aes(x = Position_mm, y = Force_N)))
  counter <- counter - 1
}

```

(This is my first post.)

Answer: 
You can apply a custom `RadListViewItem` style, like this:

```
<data:RadListView>
    <data:RadListView.ItemTemplate>
        <DataTemplate>
            <TextBlock ... />
        </DataTemplate>
    </data:RadListView.ItemTemplate>
    <data:RadListView.ItemStyle>
        <Style TargetType="listView:RadListViewItem">
            <Setter Property="VerticalAlignment" Value="Center" />
            <Setter Property="VerticalContentAlignment" Value="Center" />
            <Setter Property="MinHeight" Value="0" />
            <Setter Property="Padding" Value="0" />
        </Style>
    </data:RadListView.ItemStyle>
</data:RadListView>

```

You can of course further tweak the `Style` to meet your needs.

For more information on ItemStyling, including ItemSwipe styling, [see this article](http://docs.telerik.com/devtools/universal-windows-platform/controls/radlistview/features/listview-styling).
You can use `<fieldset>` tag within item template to control it, e.g :

```
 <telerikDataControls:RadListView x:Name="rlvProducts" Grid.Row="1" IsCheckModeActive="True" FontSize="12">
  <telerikDataControls:RadListView.ItemTemplate>
    <fieldset  style="float: left; width: 350px; height: 150px;/>
    <DataTemplate >... </DataTemplate>
  </telerikDataControls:RadListView.ItemTemplate>
</telerikDataControls:RadListView>

```

See here for more details: [doc](http://docs.telerik.com/devtools/aspnet-ajax/controls/listview/templates/data-and-layout)