MATLAB: Problems trying to use bar

barsplot

Hello im suffering some problem while trying to plot my data into bars. i have an array(7000×2)

data=xlsread('data.xlsx');
a= sortrows(data);
a(a(:,2) == 0, :) = [] ;
[U1,~,G1] = uniquetol(a(:,1));
S1 = accumarray(G1(:),a(:,2));
M1 = [U1,S1];
figure
plot(M1(:,1),M1(:,2))
ylabel('data')
xlabel('alpha')

What i want to obtain is the same figure but instead of lines with bars. I tried using bar instead of plot but nothing is showing.

Thank u in advance.

Best Answer

You can use the function below to create fake bars by using plot. This function accepts (nearly) all input arguments that plot accepts.

data=xlsread('data.xlsx');
a= sortrows(data);
a(a(:,2) == 0, :) = [] ;
[U1,~,G1] = uniquetol(a(:,1));
S1 = accumarray(G1(:),a(:,2));
M1 = [U1,S1];
figure(1),clf(1)
subplot(1,2,1)
bar(M1(:,1),M1(:,2)),hold on
plot(M1(:,1),M1(:,2),'.b')
xlim([0 0.01])
title('zoomed in')
subplot(1,2,2)
linebar(M1(:,1),M1(:,2),'b')
title('fake bars with lines')
function linebar(x,y,varargin)
x_=x(:);
sz=size(x_);
x_=[NaN(sz) x_ x_]';
y_=[NaN(sz) zeros(sz) y(:)]';
plot(x_,y_,varargin{:})
end

You can vastly increase the perfomance if you make it a continuous line by returning to y=0 instead of using NaN, but that is up to you.