how to plot different figures from the same matrix

2 次查看（过去 30 天）
Thar
Thar 2015-3-21
评论： Konstantinos Sofos 2015-3-21
Hi!
I have a matrix with 1376x3 dimensions. First column is the day, second the time and third my measurements. The matrix is:
8 7.56 316
8 8.45 319.56
8 10.78 317.4
9 12.76 323.98
9 14.27 356.89
10 13.45 346.12
10 14.2 312.43
and so on, until the day 365. (some days are missing).
I want to plot the second and third columns for each day separately.
Any ideas?
Thank you!
  2 个评论
Geoff Hayes
Geoff Hayes 2015-3-21
Thodoris - do you want all of this data on one figure or do you want one figure for each day of the year? I can't imagine you wanting up to 365 figures for all of this data so please describe what you would like to obtain and what you have attempted so far.
Thar
Thar 2015-3-21
I want one figure for each day of the year. But i can't separate and keep the data for each day.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

the cyclist
the cyclist 2015-3-21
Try this
D = [
8 7.56 316
8 8.45 319.56
8 10.78 317.4
9 12.76 323.98
9 14.27 356.89
10 13.45 346.12
10 14.2 312.43]
uniqueDays = unique(D(:,1));
numberUniqueDays = numel(uniqueDays);
for nd = 1:numberUniqueDays
indexToThisDay = D(:,1)==uniqueDays(nd);
figure
plot(D(indexToThisDay,2),D(indexToThisDay,3))
end

更多回答（1 个）

Konstantinos Sofos
Konstantinos Sofos 2015-3-21
Hi Thodoris,
As i understood in each day you (may) have more that one timestamps of measurements and you want a figure (or plot??) for each corresponding day with its measurements. So i imagine that your basic problem is an indexation problem. (Are your days format as you described i.e. 1,2,3... or in a date number format?)
Assuming the matrix that you gave us
A =
8.0000 7.5600 316.0000
8.0000 8.4500 319.5600
8.0000 10.7800 317.4000
9.0000 12.7600 323.9800
9.0000 14.2700 356.8900
10.0000 13.4500 346.1200
10.0000 14.2000 312.4300
you can find the indexation of the days as
idx=find(diff(A(:,1)) == 1) + 1; % day indexation
idx = [1;idx;length(A)]; % consider the start and the end of the time period
%plotting : Create a figure for each day
for i=1:numel(idx)-1
figure
x = A(idx(i):idx(i+1)-1,2);
y = A(idx(i):idx(i+1)-1,3);
plot(x,y,'r*-')
end
So this will give you 365 figures...is this really that you want?
Regards

类别

在 Help Center 和 File Exchange 中查找有关 Annotations 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