import excel sheet with 6 variables in first row: date (4 for each year, hence quarters), gdp, wages, inflation, interest rate. in matlab

You can use the xlsread function in MATLAB to import your Excel sheet. Here's an example code snippet that demonstrates how to use it:

main.m
filename = 'yourfilename.xlsx';
sheetname = 'Sheet1';
range = 'A1:F2';

[num, txt, raw] = xlsread(filename, sheetname, range);

% Extract the data you need
quarters = num(1,1:4);
gdp = num(1,5);
wages = num(1,6);
inflation = num(2,5);
interest_rate = num(2,6);
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Explanation of parameters used in the xlsread function:

• filename is the name of your Excel file, including the extension.
• sheetname is the name of the worksheet containing the data you want to import.
• range specifies the rectangular range to be read from the worksheet, in the format 'A1:B2'.

The function returns the numeric data in num, the text data in txt, and the raw data in raw, which is a combination of numeric and text data. In this example, we only need the numeric data, so we assign num to the variables we want to extract.

Note that xlsread can be more flexible than the example above. You can omit the range parameter to read the entire worksheet or use 'basic' parameter to extract just numbers.