Multiple Files Into Arrays

I have 62 Files each consisting of 300 rows and 4 columns.

The 1st and 2nd Columns Are The X-Coordinates (x1,x2)

The 3rd and 4th Columns Are The Y-Coordinates (y1,y2)

For each file I would like to do the following:

- Calculate: Opp = (x1-x2);

- Calculate: Adj =( y1-y2);

- Calculate: Angle_Deg = atand(Opp ./ Adj);

- Calculate: AvgAngle_Deg = mean(Angle_Deg);

- Calculate the Velocity: V = ((tand(AvgAngle_Deg)*10*cosd(30)-10*sind(30));

How would I code this so that I get 62 separate results that I can plot onto a graph?

Answer 1

[Cris LaPierre]

You have two general options.

1. Place all your code for a single file into a for loop that will loop through each of your 62 files. Use "hold on" to add additional lines to your plot.
2. Create an array for each variable you want to plot. Place the results from each file into a single column. Once completed for all files, call the plot command using the X and Y arrays. Each column will be treated as a separate series. However, this approach will only work if you have the same number of values in your plot variables for every file.

[Stephen23]

"However, this approach will only work if you have the same number of values in your plot variables for every file"

Not necessarily: preallocate that array using nan(...) and fill the required numbered of elements per column.

[SkyRider44]

would you be able to write the code?

[Cris LaPierre]

I could, but this is your assignment, not mine.

[SkyRider44]

Would it be possible if you could write a psuedo code for it? so that i can see how to structure it

[Cris LaPierre]

I kind of did already.

Combine what you've already done with what is shown on this page.