How to visualize this data? 
Here I have shown the first two lines of my data frame. It goes on for a number of lines.
I am wanting to make plots to show what is happening over time . e.g a plot showing the sequence of grip changes over time and who is making the changes P1 or P2 .
I am using R, so things I can implement in R would be relevant - and guidance on how to do so would be especially useful.
I have tried using code such as plot(mydata$Start,mydata$Name) and stripchart(mydata$Name) but I have not been successful. In some cases I get an error such as
Error in stripchart.default(mydata$Name) : invalid first argument

I am unsure how to approach this. Should it not be a data frame maybe ?
 A: There are several issues here.
The problem is not that it's a data frame, it's that you're not giving it numbers where it needs numbers. It's not even a problem that the variables (other than time) are factors.
You should be able to convert time to numbers okay, but even if your text was all strings, that wouldn't help. 
Note that when you do stripchart(mydata$Name) you're passing it names when it expects numbers. 
A: I attempted to create a dummy data frame similar to your data using the following code:
data <- data.frame(Grip.Type=rep(c('RH','LH'),times=100),
                   Start=seq(from=0.5,to=2,length.out=200),
                   Name=ifelse(rnorm(n=200,mean=1,sd=2)>0,'P1','P2'),
                   Position=c('RH : L/Knee','LH : R/Elbow'))

(Please let me know if this is the way your data looks like)
From this data frame I have attempted to create the following plot using the ggplot2 library:
Plot 01:
p1 = ggplot(data)+
    geom_point(aes(x=Start,y=Name,col=Name),size=1.5)+
    ggtitle('Plot 1')
p1


Does this look like what you are looking for?
