[NUMBER,STRING,EVERY]=xlsread("C:\Users\lenovo\Desktop\Sep_2020_Ericsson.xls")

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Tareq Rahmani 2021-1-23

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https://ww2.mathworks.cn/matlabcentral/answers/724758-number-string-every-xlsread-c-users-lenovo-desktop-sep_2020_ericsson-xls

评论： Walter Roberson 2021-1-23

Hi all

Kindly help .

I have excel file , and I riun this :

[NUMBER,STRING,EVERY]=xlsread("C:\Users\lenovo\Desktop\Sep_2020_Ericsson.xls")

now, when I run EVERY in command windows , it shows me data like this :

{'Z78NJ037' } {[ 21.93001667]} {[ 39.12541667]}

{'Z78NJ851' } {[ 21.5754]} {[ 39.15138333]}

i want to remove the {', and [ .... i want to read directly strings like Z78NJ851, 21.93001667....

How can I reference directly the values of Z78NJ851, or 21.93001667 ..??

Thanks

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Answer 1

Walter Roberson 2021-1-23

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https://ww2.mathworks.cn/matlabcentral/answers/724758-number-string-every-xlsread-c-users-lenovo-desktop-sep_2020_ericsson-xls#answer_604354

在 MATLAB Online 中打开

The { [ are display artifacts. For example you can

disp(EVERY{1,1})

and you will observe that those and the ' characters are not actually stored.

I recommend that you switch to using readtable()

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Tareq Rahmani 2021-1-23

i didn't get you.

What is the best solution if I want to process an excel file that have 1048576 rows ?

Which one is best :

1- distributed(datastore(excelFileName));

2- tall(datastore(excelFileName));

3- xlsread()

4- readtable

thanks very very much

Walter Roberson 2021-1-23

在 MATLAB Online 中打开

If you have exactly one such file, it is likely that readtable() is best. However, I have seen some reports that current readtable() might be considerably slower for large files than using xlsread() is. If you are using more complicated data types such as dates, then readtable() often makes your life a lot easier.

If you do need to use xlsread() then

names = EVERY(:,1);
value1 = cell2mat(EVERY(:,2));
value2 = cell2mat(EVERY(:,3));

and remember that there is a difference between how cells are displayed and what they store, so while

names(1:3)

might display as

    {'Z78NJ037'      }
    {'Z78NJ037'      }
    {'Z78NJ037'      }

the { and } characters are not part of what is really stored, and you can get at what is really stored using {} indexing, like names{1} would be the character vector Z78NJ037

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