gusucode.com > ​数字信号处理，包括：各种现有信号及随机信号的输入，从文件读取数据的输入 > Digital Signal Matlab ex1/RealExpSeries.m

    axes(handles.axes1);
Xaxis=str2num(get(handles.EditX,'String'));
Yaxis=str2num(get(handles.EditY,'String'));
t=[-Xaxis:Xaxis];
str={'y=a.^n: a='};
strdef={'1.1'};
SCData=inputdlg(str,'y=a.^n 请输入参数',1,strdef);
a=str2double(SCData(1));
x=(a.^t);
global Signal;
Signal=x;
%subplot(2,2,1)
%plot(x,y);
stem(t,x,'.k')
%length=max(y);
axis([-Xaxis,Xaxis,-Yaxis,Yaxis]);
title('y=a^n')