use matlab to plot fft from excel sheet

8 次查看（过去 30 天）
Tam Li Na
Tam Li Na 2019-11-8
回答： KSSV 2019-11-8
Hi
how do i plot fft from excel sheet data?
here are my codes:
Fs=20;
Ts=1/Fs;
t=0:Ts:1;
T=readtable("readings.xls");
Warning: Column headers from the file were modified to make them valid MATLAB identifiers before creating variable names for the table. The original column headers are saved in the
VariableDescriptions property.
Set 'PreserveVariableNames' to true to use the original column headers as table variable names.
>>start=T(A2);
Unrecognized function or variable 'A2'.
>>startpoint=xlsread("readings.xls",A2);
Unrecognized function or variable 'A2'.
Can I ask how to set the starting point using datas from my excel sheet? (to plot fft)
Thanks in advance!

请先登录，再回答此问题。

回答（1 个）

KSSV
KSSV 2019-11-8
It looks like there is no variable name A2 in the table. Try using:
T.(1), T.(2) etc...or check the variablenames by printing the table or using the below line:
T.Properties.VariableNames % T is the table variable

类别

在 Help Center 和 File Exchange 中查找有关 Transforms 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by