Plot 3 graphs on same figure

2015 9 1
1 个回答
回答已采纳
更新时间：2015 9 1
2 次查看（30 天）

0 个投票

Hello,
From the code below, I wanted to get 3 plots on the same figure:
  1. Plot 1 will run the x time-axis from 1 to 10 vs the next 3 columns on the y-axis
  2. Plot 2 will run the x time-axis from 80 to 89 vs the next 3 columns on the y-axis
  3. Plot 3 will run the x time-axis from 100 to 109 vs the next 3 columns on the y-axis
clear;
clc;
[FileName,PathName] = uigetfile('*.txt','Select data file');
fid = fopen( strcat(PathName,FileName) ,'rt' );
% Read the file and store into matrix v
i = 0;
v = [0 0];
while feof(fid) == 0
buffer = fscanf(fid, '%f', 4);
buffer = buffer';
if i == 0;
v = buffer;
else
v = vertcat(v,buffer);
end
i = i + 1;
end
% Time vector
time = v(:,1);
% Number vector
number_1 = v(:,2);
number_2 = v(:,3);
number_3 = v(:,4);
%hold on
plot(time,number_1,'-ro', time,number_2,'-.b', time, number_3); grid on; axis([1 120 -67 -45]);
xlabel('Time (secs)'); ylabel('Current (mA)'); legend('number1','number2','number3')
curtick = get(gca, 'XTick');
set(gca, 'XTickLabel', cellstr(num2str(curtick(:))));
Can you help me to modify the code to get my desired output?
Thanks.

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2015-9-1

1 个投票

numtime = size(v,1);
time1 = linspace(1, 10, numtime);
time2 = linspace(80, 89, numtime);
time3 = linspace(100, 109, numtime);
plot(time1,number_1,'-ro', time2,number_2,'-.b', time3, number_3);
grid on; axis([1 120 -67 -45]);
As you know the range of times you want but the number of rows of v you get is not constant, you need to interpolate the times to fit the number of rows you have.
... or was the idea that you want to extract from v the rows those times match those ranges, showing only a subset of the available data? If so then:
idx1 = 1 <= time & time <= 10;
idx2 = 80 <= time & time <= 89;
idx3 = 100 <= time & time <= 109;
v1 = v(idx1,:);
v2 = v(idx2,:);
v3 = v(idx3,:);
plot(v1(:,1), v1(:,2:4),'-ro', v2(:,1),v2(:,2:4),'-.b', v3(:,1),v3(:,2:4));
grid on; axis([1 120 -67 -45]);

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Creating, Deleting, and Querying Graphics Objects 的更多信息

产品

标签

Community Treasure Hunt

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

Start Hunting!

Translated by