Error between cell and array (matrix)

Dear Everyone.

I have my data as attached picture include date, time and price (.txt) with format:

mm/dd/yyyy hh:mm:ss number
04/14/2004 15:00:00 80
04/14/2004 15:30:00 82
04/14/2004 16:00:00 80
......

I tried to run the beginning of my code:

% File contains three columns with date,time and index price respectively
data=Excludeweekendday({'IntervalCLG1996.txt'});
n_uni_t=unique(data(:,[2])); %Unique time stamps
intm=size(n_uni_t);
n=intm(1);
intm=size(data);
n_total_obs=intm(1); %Total number of observations given 5 minutes sampling 
i=1;
j=1;
count=0;
while i<=n  %Calculate amount of timestamps 
    for j=1:n_total_obs
        if data(j,2)== n_uni_t(i,1)
            count=count+1;
        end  
    end
    n_uni_t(i,2)=count;
    count=0;
    i=i+1;
end   
end

It did not work with the error:

Undefined operator '==' for input arguments of type 'cell'.
Error in RawRVofnormalandlogreturns (line 23)
      if data(j,2)== n_uni_t(i,1)
And 
data(i,2)>0.4444 && data(i,2)<0.7431; %Boundaries in matlab format
      Norm_data(j,1:3)=data(i,1:3);

When I try to run convert my cell to double with code: b = cellfun(@(x)str2double(x), data); The result of b is totally NaN as picture.

Could you help me find the problem in code and correct it?

I'm really appriciated your help! Picture:

Answer 1

[Walter Roberson]

Try changing

data(j,2)== n_uni_t(i,1)

to

data{j,2} == n_uni_t{i,1}

[Trung Hieu Le]

I already tried it but it did not work. I think this code write for data which input as array. Do you know how I can convert from Cell to Array to use in this code? Thanks

[Geoff Hayes]

Trung - what can you tell us about the dimensions and data type for data and n_uni_t? i.e. what do the following calls return?

 size(data)
 class(data)
 size(n_uni_t)
 class(n_uni_t)

[Trung Hieu Le]

Dear Geoff Hayes,

I tried to run the file IntervalCLF1998.txt by code RawRV.... The code is written for array, however, I just have double data. I meet this error:

    Attempted to access data(1,2); index out of bounds because size(data)=[70449,1].

Could you help me check in your version which it was run smoothly or not? I used Matlab 2015a.

I'm really appreciate your help.