how to move the graph vertically downward to zero?

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lina
lina 2015-7-5
评论： Image Analyst 2015-7-5
Hi all,
In the attached graph there are 2 types of data the blue one is observed those are I want calculate the mean and shifting the graph to zero (over the red one). how can I do those calculating and shifting?
thank you in advance

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回答（1 个）

Star Strider
Star Strider 2015-7-5
Take the mean of the blue series and subtract it:
new_blue = blue - mean(blue(:));
Without your data I cannot get any more specific. The ‘blue’ here are the dependent variable data. Your independent variable (for example x) remains unchanged.
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lina
lina 2015-7-5
Sorry for this, the beginning of my script is:
jed = fopen('Jeddah.csv');%observed data
rawobs=textscan(jed,'%s %f','delimiter',',','headerlines',1);%raw observed data
fclose(jed);
datetime=datenum(jed);
data=[datenum(rawobs{1}),rawobs{2}];
ds = datestr(data(:,1),'dd mmm yyyy HH:MM ss');
obs=[datenum(rawobs{:,1}),rawobs{:,2}];
dv = datevec(obs(:,1));
[d,~,m] = unique(dv(:,1:4),'rows');
out = [d,accumarray(m,obs(:,2),[],@mean)];
out(:,6)=datenum(out(:,1),out(:,2),out(:,3),out(:,4),0,0);
plot(out(:,6),out(:,5)*100)
hold on
plot(pred(:,1),pred(:,2),'r')
datetick
Image Analyst
Image Analyst 2015-7-5
lina, come on. This is like a comedy of errors. Do you think we'll now be able to run this without giving us the jeddah.csv file?

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