how to load .txt data into a function and use it as variables in matlab function
显示 更早的评论
Hi All,
I would like to use my out source data (in .txt), into finding a graph. The data is b = a070_edit(:,1) are an variables that are varies along the frquecy range. The 'b' data will be used as an varible in a function to find an unknown 'a'. and then a graph will be plotted (f vs a).
Actually my equation is much more complicated. Thus below I use a simple equation, so that it will be easier to solve the problem.
function
load a070_edit.txt % list of data from outsource
b = a070_edit(:,1)
d = 1;
t = 5./b;
f = 50:1.5625:5600;
w = 2.*pi.*f;
a = (d./t).*w
plot (f,a)
end
Kindly, please help me to load and use an external data into matlab function.
Your help will be appreciated.
Thank you.
Regards,
Nur Arafah
采纳的回答
madhan ravi
2019-5-16
编辑：madhan ravi
2019-5-16
B % just call it
function B % not if the file is input from outside the function then parameterize you function by providing an input for it
load a070_edit.txt % list of data from outsource
b = a070_edit(:,1);
d = 1;
t = 5./b;
f = 50:1.5625:5600;
w = 2.*pi.*f;
a = (d./t).*w;
plot(f,a)
end
3 个评论
Jafar Nur Arafah
2019-5-16
Dear madhan ravi,
Thank for your help.
The code works but the graph is not as what I'm expecting.
As 'b' is a parameter depending on f (which means each 'b' is for each 'f'). Thus, I'm expecting the graph to be 1 line only connecting each calculated value of 'a'.
I'm not very sure the 'data' is from where. Please correct me if i'm wrong.
P/S: the total value of 'b' attached is only about 10. But there are total of 3552 b's (which match with f = 50:1.5625:5600.
Tq.
madhan ravi
2019-5-16
b has 10 values , f has 3553 values
Jafar Nur Arafah
2019-5-17
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Data Import and Export 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
