问题
I'm trying to plot 3 lines on the same figure with dates on X-axis . I can do it perfectly on without having dates on x-axis but when I try to put years on x-axis I get this error :
error: __plt2vv__: vector lengths must match
I'm not familiar with MATLAB and this is my first tiral , here is the part of my code where I try to plot :
data = importdata('2.txt');
C = data.data.';
C = C';
N = length(C);
H = 12;
w = ones(2 * H + 1, 1);
Lambda_Tilde = NaN * zeros(N, 1);
L_Tilde = NaN * zeros(N, 1);
U_Tilde = NaN * zeros(N, 1);
for t = (H+1):(N-H-1)
Lambda_Tilde(t) = sum(w .* C(t-H:t+H)) / sum(w);
L_Tilde(t) = poissinv(0.005, Lambda_Tilde(t));
U_Tilde(t) = poissinv(0.995, Lambda_Tilde(t));
end
clf
f=figure();
t= (1996 : 2007);
dateFormat = 10;
datetick('x',dateFormat)
plot(datenum(t,1,1), C, 'co*');
hold on
plot(datenum(t,1,1) , L_Tilde, 'g-.');
plot(datenum(t,1,1) , U_Tilde, 'g-.');
pause;
Now I understood where the problem is . C is a 1*144 Matrix, so is there a way to try to plot
plot(1:N , C , 'co*' )
and having dates on xaxis instead of having random numbers? I will appreciate any guidance .
回答1:
I think what you want to do is change the shape of t so that it is a 1x144 matrix with repeated dates in it (1996 12x, 1997 12x etc). Then you can plot(t,C) and it should work. To change the shape, you can use:
dates = [1996:2007]; %Creates the original dates matrix (your t)
N = size(dates,2); %finds the length of that matrix (12 in your case)
M = 12; %sets the number of repetitions
dates= repmat(dates,M,1); %repeats each date M times, but they are still listed in columns
dates = reshape(dates,N*M,1); %changes the shape from columns containing the same shape to 1 column
来源:https://stackoverflow.com/questions/26240126/ploting-dates-on-x-axis-in-octave-error-plt2vv-vector-lengths-must-match