I have a file name 'partOneData.mat how do I load the data and create a histogram from Matlab.

I have a file name 'partOneData.mat how do I load the data and create a histogram from Matlab.

I have this but it does not seem to work close all;

commandwindow;

%loads mat file

a = load('partOneData.mat');

figure;

hist(a);

[Adam Danz]

What doesn't it work? Are you getting an error message? If yes, please copy and paste it here; if no, please specify what's wrong.

I'm assuming the variable you're trying to plot is named 'a'.

Lastly, if you're using a more recent version of matlab, use histrogram() instead of hist().

[G. Nardi]

Thank you for your reponse this is the error

Error using histogram

Expected input number 1, x, to be one of these types:

double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64, logical, datetime, duration

Instead its type was struct.

Error in histogram>parseinput (line 250)

validateattributes(x,{'numeric','logical','datetime','duration'},...

Error in histogram (line 145)

[opts,passthrough,dispatch] = parseinput(args,firstaxesinput);

Error in Takahashi_Week1 (line 8)

histogram(a)

Answer 1

[Adam Danz]

First read about the output to the load() funciton:

https://www.mathworks.com/help/matlab/ref/load.html#btm0etn-4

The output is a structure containing fields for each variable in the file.

Suppose the variable you're trying to plot is named 'data'

a = load('partOneData.mat');   %'a' is a structure
figure                        
histogram(a.data)              % 'data' is the name of the variable you're plotting

Also see this example:

https://www.mathworks.com/help/matlab/ref/load.html#btm3ohm-1