Help with Legend for Plot

I am struggling to clean up the legend for the final figure. I only want to label y3T1, y4T1, y5T1, y6T1, and y7T1. I've tried using the plot editor but can't seem to figure out how to only have those specific data points only.

Attached is the main script (T1) the curve fits (T1Fit) and the raw data i'm working with.

Appreciate any help!

Answer 1

[Alex]

Solved it! I had to call the certain indices for p1-p5 in the legend.

legend([p1(1),p2(1),p3(1),p4(1),p5(1)], 'CuSO4-0.625%', 'CuSO4-1.25%', 'CuSO4-2.5%', 'CuSO4-5%','CuSO4-10%')

Answer 2

[VBBV]

clc;    % Clear the command window.
close all; 



filename = 'amplitudeT1cleaned.xlsx';
data = readtable(filename);

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 'VariableNamingRule' to 'preserve' to use the original column headers as table variable names.

VN = data.Properties.VariableNames

VN = 1×9 cell array
    {'MineralOil'}    {'Glycerol'}    {'CuSO40_625_'}    {'CuSO41_25_'}    {'CuSO42_5_'}    {'CuSO45_'}    {'CuSO410_'}    {'tau'}    {'t0_625'}

tau = table2array(data(:,8))/1000;
y= table2array(data);
y1= table2array(data(:,1));
y2= table2array(data(:,2));
y3T1= table2array(data(:,3));
y4T1= table2array(data(:,4));
y5T1= table2array(data(:,5));
y6T1= table2array(data(:,6));
y7T1= table2array(data(:,7));
t1 = table2array(data(:,9));

figure(1)
plot(t1,y3T1,t1,y4T1,t1,y5T1,t1,y6T1,t1,y7T1)
grid
xlabel('Time')
ylabel('Amplitude')
legend(VN{3:7}, 'Location', 'best')

Warning: Error updating Legend.

String scalar or character vector must have valid interpreter syntax:
CuSO410_

err = std(y3T1)/length(y3T1)

err = 0.0492

err1 = std(y4T1)/length(y4T1)

err1 = 0.0421

err2 = std(y5T1)/length(y5T1)

err2 = 0.0328

err3 = std(y6T1)/length(y6T1)

err3 = 0.0159

err4 = std(y7T1)/length(y7T1)

err4 = 0.0136

Answer 3

[Walter Roberson]

errarbar(t1,y7T1,err4)

That should be errorbar() not errarbar()

legend('CuSO4-0.625%', 'CuSO4-1.25%', 'CuSO4-2.5%', 'CuSO4-5%','CuSO4-10%')

change that to

legend([p1;p2;p3;p4;p5], {'CuSO4-0.625%', 'CuSO4-1.25%', 'CuSO4-2.5%', 'CuSO4-5%','CuSO4-10%'})

[Alex]

Just tried that this is the figure it gave me, it is labeling the curves as the sample

[Walter Roberson]

Reminder that people typically cannot examine fig files from their phone, so images are typically more useful than fig files

[Alex]

Sorry I didn't Think about that!