Removing rows from table based on content

Hi,

I got some data with "false" values that I need to remove

The data looks as following...

I need to remove all rows that include the letter "x". The fourth column sometimes consists only of the letter "x", sometimes it consists of "x" and other values as seen on the picture.

I am loading the data usinf following code

filename = 'Sample.txt';
fileID = fopen(filename);

opts = detectImportOptions(filename);
opts.VariableTypes{1} = 'string';
opts.VariableTypes{4} = 'string';

M = readtable(filename,opts);

fclose(fileID);

All help is welcomed and appreciated.

Answer 1

[KALYAN ACHARJYA]

If you are wish to check the single string with x only, as in the rows 6 and 7, then you can accomplish it easily. In that case it avoid the removal of row 5, where x is also there within the string ( with Gap consideation).

id=find(strcmp('x',M.Var4));
M(id,:) = []

Result:

M =
  10×4 table
         Var1          Var2       Var3                    Var4             
    _______________    ____    __________    ______________________________

    "1598607723000"      4     6.5162e+14    "9049F00430000764B1BD4046DCEA"
    "1598607723000"     12     6.5162e+14    "8D06A10E99158B12D00427C73A6C"
    "1598607723000"     14     6.5162e+14    "8D06A10E99158B12D00427C73A6C"
    "1598607723000"     16     6.5162e+14    "8D06A10E99158B12D00427C73A6C"
    "1598607723000"     10     6.5162e+14    "8D06A10E99158B12D00427C73A6C"
    "1598607723000"     12     6.5162e+14    "x  5D4BCCB982A069"           
    "1598607723000"     14     6.5162e+14    "8D48C12B5811F16DD1085E938F4F"
    "1598607723000"     12     6.5162e+14    "8D48C12B5811F16DD1085E938F4F"
    "1598607723000"      4     6.5162e+14    "8D48C12B5811F16DD1085E938F4F"
    "1598607723000"      3     6.5162e+14    "8D48C12B5811F16DD1085E938F4F"

But If you wish to remove the 5 rows also, within the strings x is there, not single 'x' string, in that case I have used loop, may be it can be avoided.

for i=1:length(M.Var4)
     id(i)=max(strcmp('x',split(M.Var4(i))))
end 
M(id,:) = []

Result:

M =
  9×4 table
         Var1          Var2       Var3                    Var4             
    _______________    ____    __________    ______________________________
    "1598607723000"      4     6.5162e+14    "9049F00430000764B1BD4046DCEA"
    "1598607723000"     12     6.5162e+14    "8D06A10E99158B12D00427C73A6C"
    "1598607723000"     14     6.5162e+14    "8D06A10E99158B12D00427C73A6C"
    "1598607723000"     16     6.5162e+14    "8D06A10E99158B12D00427C73A6C"
    "1598607723000"     10     6.5162e+14    "8D06A10E99158B12D00427C73A6C"
    "1598607723000"     14     6.5162e+14    "8D48C12B5811F16DD1085E938F4F"
    "1598607723000"     12     6.5162e+14    "8D48C12B5811F16DD1085E938F4F"
    "1598607723000"      4     6.5162e+14    "8D48C12B5811F16DD1085E938F4F"
    "1598607723000"      3     6.5162e+14    "8D48C12B5811F16DD1085E938F4F"

[KALYAN ACHARJYA]

Later (more free time), I will update the 2nd one without loop, if any.

[Jakub Steiner]

Thanks a lot sir, you made my day much better.