MATLAB: Mismatched plot when editing the x-axis

MATLABplotsimulinkx axis

This is the code I ued when opening a plot in matlab command from simulink.

plot(out.x(:,1), out.x(:,2), out.x(:,1), out.x(:,3), out.x(:,1), out.x(:,4))

The x-axis runs from 0-100, which I want to change to 1960:1.49:2060

I used

timedata=1960:1.49:2060;

so that they cover the same length.

plot(timedata, out.x(:,2), timedata, out.x(:,3), timedata, out.x(:,4));

I am not sure why there is a difference between the two graph? There shouldn't be apart from the x-axis.

Best Answer

out.x(:,1) is not evenly spaced. Plot it by itself and you will see. Or look at diff(out.x(:,1))

Related Solutions

MATLAB: How to plot years on x axis

There are several ways to approach that, including datetime (link) arrays.

A simple solution is:

M = [  1975  -66.0577 
       1975  -66.3039 
       1975  -65.4235 
       1975  -66.6143 
       1975  -66.1449 
       1975  -70.4912 
       1975  -73.0337 
       1975  -73.8322 
       1975  -69.5114 
       1975  -65.6445 
       1975  -65.815 
       1975  -65.5371 
       1976  -63.9651 
       1976  -66.7147 
       1976  -66.5698 
       1976  -66.4407 
       1976  -66.4912 
       1976  -69.1049 
       1976  -71.5498 
       1976  -73.0278 
       1976  -70.1491 
       1976  -69.9583 
       1976  -68.8625 
       1976  -63.2717];
T = datenum([M(:,1) ceil(rem(1:size(M,1),12.1))', zeros(size(M,1),3) ones(size(M,1),1)]);
figure
plot(T, M(:,2))
datetick('x', 'yyyy')
xlim([min(T), max(T)])

Experiment to get the result you want.

MATLAB: How to start the plot from the beginning of the x-axis

clc; clear all ;
time = datetime(1974,1:492,1);
y1 = randn(492,6);
y2 = randn(492,6);
figure;
k = 1 : 6;
a= 0 :5;
varnames_y1 ={'A ', 'B', 'C' , 'D' , 'E', 'F'} ;
for i = 1:6;
    subplot(6,2,a(i)+ k(i))
    % filename = plot( time' , y1( : , i ) );
    x = datenum(time) ;
    filename = plot( x' , y1( : , i ) );
    axis tight
    datetick('x','mm:yyyy','keeplimits')
    title ( varnames_y1(i));
    hold on
end
varnames_y2 ={'G ', 'H', 'I' , 'J' , 'K', 'L'} ;
for i = 1:6;
    subplot(6,2,a(i)+ k(i) + 1)
    x = datenum(time) ;
    filename = plot( x' , y2( : , i ) );
    axis tight
     datetick('x','mm:yyyy','keeplimits')
    title ( varnames_y2(i));
    hold on
end

Best Answer

Related Solutions

MATLAB: How to plot years on x axis

MATLAB: How to start the plot from the beginning of the x-axis

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