Invalid expression in reading the file

function [rR,CL,effi1] = import_cl_effi(general_data,16, 45);
%IMPORTFILE1 Import numeric data from a text file as column vectors.
%   [RR,CL,EFFI1] = IMPORTFILE1(FILENAME) Reads data from text file
%   FILENAME for the default selection.
%
%   [RR,CL,EFFI1] = IMPORTFILE1(FILENAME, STARTROW, ENDROW) Reads data from
%   rows STARTROW through ENDROW of text file FILENAME

%% Initialize variables.
delimiter = ' ';
if nargin<=2
    startRow = 16;
    endRow = 45;
end

%% Format string for each line of text:
%   column2: double (%f)
%	column5: double (%f)
%   column9: double (%f)
% For more information, see the TEXTSCAN documentation.
formatSpec = '%*s%f%*s%*s%f%*s%*s%*s%f%*s%*s%[^\n\r]';

%% Open the text file.
fileID = fopen('general_data.txt','r');

%% Read columns of data according to format string.
% This call is based on the structure of the file used to generate this
% code. If an error occurs for a different file, try regenerating the code
% from the Import Tool.
textscan(fileID, '%[^\n\r]', startRow(1)-1, 'ReturnOnError', false);
dataArray = textscan(fileID, formatSpec, endRow(1)-startRow(1)+1, 'Delimiter', delimiter, 'MultipleDelimsAsOne', true, 'EmptyValue' ,0.0,'ReturnOnError', false);
for block=2:length(startRow)
    frewind(fileID);
    textscan(fileID, '%[^\n\r]', startRow(block)-1, 'ReturnOnError', false);
    dataArrayBlock = textscan(fileID, formatSpec, endRow(block)-startRow(block)+1, 'Delimiter', delimiter, 'MultipleDelimsAsOne', true, 'EmptyValue' ,0.0,'ReturnOnError', false);
    for col=1:length(dataArray)
        dataArray{col} = [dataArray{col};dataArrayBlock{col}];
    end
end

%% Close the text file.
fclose(fileID);


%% Allocate imported array to column variable names
rR = dataArray{:, 1};
CL = dataArray{:, 2};
effi1 = dataArray{:, 3};

I am getting following error

Error: File: import_cl_effi.m Line: 1 Column: 54

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax

error. To construct matrices, use brackets instead of parentheses.

Answer 1

[Stephen23]

function [rR,CL,effi1] = import_cl_effi(general_data,16, 45);
%                                                    ^^  ^^ Not valid in a function definition.

You will need something like this:

function [rR,CL,effi1] = import_cl_effi(general_data, startRow, endRow);