diff --git a/correct_magnetic_basline.m b/correct_magnetic_basline.m
index 300201f..880073f 100644
--- a/correct_magnetic_basline.m
+++ b/correct_magnetic_basline.m
@@ -1,7 +1,101 @@
-function [outputArg1,outputArg2] = correct_magnetic_basline(inputArg1,inputArg2)
-%CORRECT_MAGNETIC_BASLINE Summary of this function goes here
-%   Detailed explanation goes here
-outputArg1 = inputArg1;
-outputArg2 = inputArg2;
+function [dataOUT] = correct_magnetic_basline(dataIN)
+%CORRECT_MAGNETIC_BASLINE UI for basline correction along field axis
+%
+%   Usage: [dataOUT] = CORRECT_MAGNETIC_BASLINE(dataIN), where dataIN is a
+%   dataset loaded via the LOAD_MATLAB or LOAD_BRUKER function.
+%
+%   The function will show the input data and offer an input field, where
+%   the number of field basline points should be set. By pressing "Apply" the
+%   correction will be executed and the graph changes to the corrected data.
+%   By pressing "Reset" the graph will return to show the original data.
+%   Exit the function by pressing "Done".
+
+%% creating UI
+fig = figure;
+fig.Name = 'Correct Magnetic Baseline';
+fig.Units = 'Normalized';
+fig.Position = [.2 .2 .6 .6];
+fig.Tag = 'CorrMagBase';
+
+%panel for plot
+plotpanel = uipanel(fig);
+plotpanel.Units = 'Normalized';
+plotpanel.Position = [.01 .06 .98 .92];
+%axes for plot
+ax = axes(plotpanel);
+ax.XLabel.String = 'Magnetic field';
+ax.YLabel.String = 'Intensity';
+%plot current data in figure with field as x axis
+dataIN_transp = dataIN.';
+plot(ax,dataIN_transp)
+axis tight
+
+%create push buttons
+a = uicontrol(fig,'Style','pushbutton');
+a.String = 'Apply';
+a.Units = 'Normalized';
+a.Position = [.52 .01 .15 .05];
+a.FontUnits = 'Normalized';
+a.FontSize = 0.6;
+a.Tag = 'Apply';
+a.Callback = @FieldApplyButtonPushed;
+
+r = uicontrol(fig,'Style','pushbutton');
+r.String = 'Reset';
+r.Units = 'Normalized';
+r.Position = [.68 .01 .15 .05];
+r.FontUnits = 'Normalized';
+r.FontSize = 0.6;
+r.Tag = 'Reset';
+r.Callback = @FieldResetButtonPushed;
+
+d = uicontrol(fig,'Style','pushbutton');
+d.String = 'Done';
+d.Units = 'Normalized';
+d.Position = [.84 .01 .15 .05];
+d.FontUnits = 'Normalized';
+d.FontSize = 0.6;
+d.Tag = 'Done';
+d.Callback = @FieldDoneButtonPushed;
+
+%create input field
+p = uicontrol(fig,'Style','edit');
+p.Units = 'Normalized';
+p.Position = [.01 .01 .5 .05];
+p.HorizontalAlignment = 'left';
+p.FontUnits = 'Normalized';
+p.FontSize = 0.6;
+p.Tag = 'FieldPoints';
+
+uicontrol(p); %passes focus to input
+uiwait(fig)
+
+%% Callback functions
+    function FieldApplyButtonPushed(src,event)
+        field_baseline = str2double(get(p,'String'));
+        %field baseline CORRECTING
+        data_size = size(dataIN);
+        dataOUT = zeros(data_size);
+        baseline_mean_right = mean(dataIN(:,1:field_baseline),2);
+        baseline_mean_left = mean(dataIN(:,end-field_baseline:end),2);
+        baseline_mean = (baseline_mean_right + baseline_mean_left) / 2;
+        for n = 1:data_size(1)
+            dataOUT(n,:) = dataIN(n,:) - baseline_mean(n);
+        end
+        %plotting result with field as x axis
+        dataOUT_transp = dataOUT.';
+        plot(ax,dataOUT_transp)
+        axis tight
+    end
+
+    function FieldResetButtonPushed(src,event)
+        plot(ax,dataIN_transp)
+        axis tight
+    end
+
+    function FieldDoneButtonPushed(src,event)
+        close 'Correct Magnetic Baseline'
+    end
+
 end