Matlab questions: Read from Excel file

[pp84]

Hi,
Looking for a bit of cheeky help with matlab, I am stumped!

1) I have written a program that i want to cycle through different sets of data, ideally this is what i would like:
These are all xls files with columns of data

ydata = ...
xdata = ...
zdata = ...

for variable = ydata:xdata:zdata
do function to each of the variables seperatly
write function results(variable) and save data
end

Is this possible?

2) When calling a file name eg:

[FTSE] = xlsread('Normalised Smooth Data.xlsx', 'FTSE', 'A1:A300')

I want to replace 300 with a variable rather than changing many of them manually everytime i need to change that number, so i would have something like this:

numberofpoints = 300
[FTSE] = xlsread('Normalised Smooth Data.xlsx', 'FTSE', 'A1:Anumberofpoints')

Again, is this possible? I am sure it is i just don't know the key commands.

Any help would be much appretiated.

Thanks

Punit

 

[Mark44]

OP last seen in 2010. Anyone want to take a crack at it, anyway!

 

[Orodruin]

One way of doing this would be to use string concatenation to construct the relevant string, i.e., do something like

N = 300;
str = strcat('A1:A',int2str(N));

You can then use the str variable instead of 'A1:A300' in your original code (or you can put the strcat and everything in its argument as the argument of xlsread directly).

 

[Wrichik Basu]

Note that as of R2019a, Matlab no longer recommends the xlsread function. Use readmatrix instead.