Include legends based on column names in for loop

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Vlatko Milic
Vlatko Milic 2022-1-12
评论： Mathieu NOE 2022-5-16
Hi,
I have a loop which processes three tables. Each table has ten columns (in addition, each column includes column names). When I plot the three figures in the loop, I want to include legends which state the column name of each variable within the plot. I know how to make this manually by typing the legends in the Matlab code. However, since the column names are changing depending on table I want to perform this automatically in the script. My though is to use "Display" but I do not know how to apply this kind of approach. In terms of code procedure, I thought something similar to this (not working unfortunately):
vnames=Table_.Properties.VariableNames;
for v = 1:numTables
%Processing of the code
plot(Table_.Col1,Table_{:,3},'DisplayName',vnames(v))
legend show
end
Grateful for any advice.
  1 个评论
Vlatko Milic
Vlatko Milic 2022-1-12
Thank you! I made some changes to the code and now it works for several tables.
All the best

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采纳的回答

KSSV
KSSV 2022-1-12
Ran in:
id = (1:10)' ;
x = rand(10,1) ;
y = rand(10,1) ;
z = rand(10,1) ;
T = table(id,x,y,z)
T = 10×4 table
id x y z __ ________ ________ ________ 1 0.60378 0.39943 0.005615 2 0.039465 0.2604 0.33861 3 0.24765 0.47166 0.71508 4 0.33116 0.064591 0.014081 5 0.87429 0.19372 0.8671 6 0.80526 0.74176 0.52277 7 0.61993 0.51138 0.34342 8 0.37336 0.11143 0.9837 9 0.73479 0.22456 0.58077 10 0.14989 0.96124 0.2604
figure
hold on
for i = 2:4
plot(T.(1),T.(i),'DisplayName',T.Properties.VariableNames{i})
end
legend

更多回答（1 个）

Mathieu NOE
Mathieu NOE 2022-1-12
hello
see my little demo below to use the table varibales names as legend
the csv data file is attached
clearvars
clc
%get the data from table
T = readtable('pH_Data.csv'); %Reads Table or CSV File
vnames=T.Properties.VariableNames; % {'DateAndTimeRun1'} {'Time_s_Run1'} {'Voltage_mV_Run1'} {'pHRun1'}
time = T.Time_s_Run1; % time (s)
data = table2array(T(:,3:end)); % data
plot(time,data);
lgstr = vnames(3:end); % use vnames to make legend strings
% legend strings convert underscore to blanks for better legend readability
for ck = 1:numel(lgstr)
tmp = char(lgstr(ck));
ind = strfind(tmp,'_');
tmp(ind) = ' ';
lgstr{ck} = tmp; % update
end
legend(lgstr);
  7 个评论
显示 5更早的评论
Vlatko Milic
Vlatko Milic 2022-5-16
it works perfectly, thank you so much!
I had forgotten to remove some of the code I was working on, hence the comment in the code from my side.
Thank you!

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