MATLAB: How to put errorbars

errorbars

Hi Everyone, How can i put errorbars in my figure below (Between red and green graphs)?

Best Answer

Use the errorbar function on the line of your choice. The easiest way to do this is to plot that line, then use hold to plot the others:

figure(1)
errorbar(Traffic, EngsetPb, barvector)
hold on
plot( ... the rest ... )
hold off
grid

Hypothetical variables here.

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MATLAB: Standard error of Weibull MLE estimates

The standard error is basically 1/4 of the length of the confidence interval.

MATLAB: Plot confidence interval of a signal

In order to calculate the 95% confidence intervals of your signal, you first will need to calculate the mean and *|std| (standard deviation) of your experiments at each value of your independent variable. The standard way to do this is to calculate the standard error of the mean at each value of your independent variable, multiply it by the calculated 95% values of the t-distribution (here), then add and subtract those values from the mean. The plot is then straightforward. (The tinv function is in the Statistics and Machine Learning Toolbox.)

Example —

x = 1:100;                                          % Create Independent Variable
y = randn(50,100);                                  % Create Dependent Variable ‘Experiments’ Data
N = size(y,1);                                      % Number of ‘Experiments’ In Data Set
yMean = mean(y);                                    % Mean Of All Experiments At Each Value Of ‘x’
ySEM = std(y)/sqrt(N);                              % Compute ‘Standard Error Of The Mean’ Of All Experiments At Each Value Of ‘x’
CI95 = tinv([0.025 0.975], N-1);                    % Calculate 95% Probability Intervals Of t-Distribution
yCI95 = bsxfun(@times, ySEM, CI95(:));              % Calculate 95% Confidence Intervals Of All Experiments At Each Value Of ‘x’
figure
plot(x, yMean)                                      % Plot Mean Of All Experiments
hold on
plot(x, yCI95+yMean)                                % Plot 95% Confidence Intervals Of All Experiments
hold off
grid

This should get you started.

Best Answer

Related Solutions

MATLAB: Standard error of Weibull MLE estimates

MATLAB: Plot confidence interval of a signal

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