Plot different signals in a single plot using days as reference on the x-aixs

I need to plot (two months days/60 days data) many signals in one graph, for example: 1st signal has 50,000 data points for 2 months, 2nd signal has 30,000 data points for 2 months, 3rd signal has 4,000 data points for 2 months, so on and so forth...

http://i.imgur.com/A1eB4rY.png from the figure, some of the signals falling shorter than the one has more data points. So it plots against the data points but I need to plot against day as a reference, please provide me a suggestions on this, thanks in advance

Answer 1

[Salaheddin Hosseinzadeh]

Hi Ramas,

I guess I understood your prob.

You have to calibrate the X axis according to your highest number of data points which is apparently 50000

so make the days as such for each data set.

days = linspace(0,60,numel(sig1));

which is equal to

days = linspace(0,60,50000);

if assumming that sig1 has 50000 data

then you have to plot as follow for each data set

plot(days,sig1)

Hope you get it and that helps.

Good Luck!

[Ramas Sami]

Thanks @Salaheddin Hosseinzadeh, your solution gives good directions really I didn't think of, let me work out and get back to you with the results.

[Salaheddin Hosseinzadeh]

I'm glad that you found the way.

BTW, you can change the axis ticks to make them from 1 to 60 on X axis

axesHandle = axes(); % creating axes for plot

or take the handle of current axes

axesHandle = gca;

then

xlim(axesHandle,[1,60]); % defining axes limit
days = 1:x:60; % change x to 2 and it would be every other day
set(axesHandle,'XTick',days);

Answer 2

[dpb]

Convert the dates to Matlab datenum, plot against them and use datetick to create the time-basis x-axis.

Examples are in doc's for

doc datenum % and friends
doc datetick

[Ramas Sami]

Thanks @dpb, I have been working on the previous answer provided.