Update the `kp_viz()` function

The MATLAB kp_viz() function was built to produce insight on the carbon isotopes for the data. The filename creation scheme needs to be updated to fit the new relative path scheme.

Old version:

% Save figure as .fig to working directory
fi       = sprintf("MATLAB_figs\\%s_%s_CH4_and_CO2_d13C_KP_sig_bar.fig",...
                    site_tag, ddmmmyyyy);
fig_file = working_dir+fi;

Due to the fact that the directories are now written as variables directly to the "MATLB_figs" directory, the new version needs to be:

% Save figure as .fig to working directory
fi       = sprintf("%s_%s_CH4_and_CO2_d13C_KP_sig_bar.fig",...
                    site_tag, ddmmmyyyy);
fig_file = fullfile(matlab_fig_dir,fi);

for all figures in the function.

Also, the input arguments need to be changed accordingly from:

function [fig09,fig10] = kp_viz(ChamON_data, nchams,                    ...
                                KP_Fits,                                            ...
                                KP_coeffs, KP_coeffs_ci,                ...
                                site_tag, ddmmmyyyy,                    ...
                                working_dir)

and changed to:

function [fig09,fig10] = kp_viz(ChamON_data, nchams,                    ...
                                KP_Fits,                                            ...
                                KP_coeffs, KP_coeffs_ci,                ...
                                site_tag, ddmmmyyyy,                    ...
                                matlab_fig_dir)

907Resident / caldera-gases

Update the `kp_viz()` function #6