Get the data points after smoothening the plot

I have 2 columns and 2388 rows.

I have plotted a graph with input column as y-axis and time as x-axis.

plot(table{3:2388,1}, {3:2388,2});

Then I smoothened the plot and obtained a graph as shown below.

smooth_curve = smoothdata(table{3:2388,2});

plot(table{3:2388,1}, smooth_curve);

How can I get the input(table{3:2388,2}) datapoints after smoothening the graph.

Answer 1

[Star Strider]

I am not certain what you are asking.

Try this —

T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1096630/Untitled%20spreadsheet.xlsx')

T1 = 2388×2 table
     TIME      INPUT  
    ______    ________

    203.24      -9e-05
    203.26      -9e-05
    203.28      -9e-05
     203.3      -9e-05
    203.33      -9e-05
    203.35      -9e-05
    203.37      -9e-05
    203.39    -0.00024
    203.41      -9e-05
    203.44    -0.00024
    203.46    -0.00024
    203.48    -0.00024
     203.5    -0.00024
    203.53    -0.00024
    203.55    -0.00024
    203.57    -0.00045

% smooth_curve = smoothdata(T1{3:2388,2});
smooth_curve = smoothdata(T1.INPUT);
T1 = addvars(T1,smooth_curve)                                               % Add 'smooth_curve' To 'T1'

T1 = 2388×3 table
     TIME      INPUT      smooth_curve
    ______    ________    ____________

    203.24      -9e-05     -0.0021584 
    203.26      -9e-05       -0.00219 
    203.28      -9e-05      -0.002221 
     203.3      -9e-05     -0.0022515 
    203.33      -9e-05     -0.0022862 
    203.35      -9e-05     -0.0023203 
    203.37      -9e-05     -0.0023538 
    203.39    -0.00024     -0.0023866 
    203.41      -9e-05     -0.0024189 
    203.44    -0.00024     -0.0024461 
    203.46    -0.00024     -0.0024773 
    203.48    -0.00024      -0.002508 
     203.5    -0.00024     -0.0025382 
    203.53    -0.00024     -0.0025679 
    203.55    -0.00024     -0.0025971 
    203.57    -0.00045     -0.0026258 

VN = T1.Properties.VariableNames;

figure
plot(T1.TIME, T1.INPUT, 'DisplayName',VN{2})
hold on
plot(T1.TIME, T1.smooth_curve, 'DisplayName',strrep(VN{3},'_','\_'))        % 'Escape' The Underline So It Prints Correctly In Tne 'legend'
hold off
legend('Location','best')

.