Exporting fit parameters to text file (for beginner)

[Aimee Coleman]

I am new to coding and looking to export the fit parameters/function variables of two peak fits to a text or CSV file. I want to export height, centre, gwidth1 and 2 and shape 1 and 2 on a split-Voight function fit.

Could someone please explain to me in basic terms how to do this, possibly using the GUI?

I am looking for a way to speed up my data fitting, so I don't have to copy and paste.

Thank you

[Guillermo Copello]

Hi Aimee,

Once you have fitted your peaks, in the GUI, at the top bar go to "Functions" and select "Export peak parameters".

You will end up with a .peaks file that is basically a txt or csv file that you can open with a simple software such as notepad, xed, kate, etc or even libreoffice calc or excell.

Best regards

Guillermo

[Aimee Coleman]

Hi Guillermo,

Thank you - that's exactly what I'm looking for.

Best wishes,
Aimee

[Jasper Ristkok]

Dear Aimee and others with similar task,

In addition to the GUI method I'll share how to do it in code in case somebody has a lot of data. An example can be found here: https://github.com/Tshepajev/fityk-libs-spectra-script/blob/master/analyze_and_plot.lua . More specifically in the function "write_output()" (ctrl + f to find it).

In short the LUA code is off the top of my head:

-- gets table of fitted lines/functions

dataset_index = 0

functions = F:get_components(dataset_index)

-- open file for output (change path)

filename = "/Users/jasper/repos/fityk-libs-spectra-script/Examples/387nm_Mo_example/Output.txt"
file = io.open(filename, "a")

io.output(file)

-- iterate over lines, probably could also use #functions instead of nr_of_lines

nr_of_lines = 2

for  line_index = 1, nr_of_lines, 1 do

-- Reads the variable. Other variables can be accessed by writing their name instead of "height", e.g. "area"

height = functions[line_index]:get_param_value("height")

-- Writes to output file. First fitted line needs special approach

io.write("\t" .. height)

end

-- wrap things up, close file

io.write("\n")

io.close(file)

Cheers!

Jasper