Plotting from txt file

[skematic]

Dear all,

I have a text file that looks like this

2723 PID 20.00 21.56 0.00 0.00 0.00 0.00 Manual Direct
3723 PID 20.00 21.56 0.00 0.00 0.00 0.00 Manual Direct
4724 PID 20.00 21.56 0.00 0.00 0.00 0.00 Manual Direct
5725 PID 20.00 21.56 0.00 0.00 0.00 0.00 Manual Direct
6725 PID 20.00 21.56 0.00 0.00 0.00 0.00 Manual Direct
7727 PID 20.00 21.56 0.00 0.00 0.00 0.00 Manual Direct

I want to make a 2D plot with column 1 as x and column 4 as y.

I've looked up online, here is what I end up with.

filename='output1480196986778.txt';
fid = fopen(filename, 'r');
data = textscan(fid, '%s %s %s %s %s %s %s %s %s %s');
plot(data{1}, data{4});
fclose(fid);

data does get populated with the data from the txtfile but the plot function
gives this 

error: plot: no data to plot
error: parse error

How can I make this plot?




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