Upload data from file and store into variable

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Kartavya
Kartavya 2014-4-18
编辑： per isakson 2014-4-20
HI, So far I have the code that takes the coordinates from the airfoil and stores all of them in a variable to be later used in the code. However I need to know how many points are being stored in the variables.
This is the input file
1.0000000 0.0000000
0.9500000 -.0074400
0.9000000 -.0130900
0.8000000 -.0204800
0.7000000 -.0236700
0.6000000 -.0235600
0.5000000 -.0216500
0.4000000 -.0191400
0.3000000 -.0183300
0.2000000 -.0195200
0.1500000 -.0207600
0.1000000 -.0220100
0.0750000 -.0222300
0.0500000 -.0218500
0.0250000 -.0195800
0.0125000 -.0164400
0.0000000 0.0000000
0.0125000 0.0204600
0.0250000 0.0304200
0.0500000 0.0456400
0.0750000 0.0576700
0.1000000 0.0670900
0.1500000 0.0822400
0.2000000 0.0921800
0.3000000 0.1018700
0.4000000 0.0993600
0.5000000 0.0897500
0.6000000 0.0743400
0.7000000 0.0567300
0.8000000 0.0378200
0.9000000 0.0197100
0.9500000 0.0116600
1.0000000 0.0000000
This is the code I'm using to get data from the file:
function [x,y]=AirfoilC
load Airfoil.dat; % read data into the my_xy matrix
x = Airfoil(:,1); % copy first column of my_xy into x
y = Airfoil(:,2);
So I need another variable that states how many points are being stored in x and output that for later usage.

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回答（1 个）

per isakson
per isakson 2014-4-18
编辑：per isakson 2014-4-20
Try
number_of_rows_of_my_xy = size( my_xy, 1 );
and
doc size

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