Plot Function (fnplt) graph controls

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Ulvi Rahmanli
Ulvi Rahmanli on 27 Aug 2018
Edited: Amal George M on 30 Aug 2018
I am using fnplt to fit curve to my data. My difficulty is to control marker instances and style on the attached graph. I want all marker instances match given instances on the shown Polar Angle axis. Markers need to be a bit bigger and filled with the same colour of curve.
Any comment is appreciated
cs = csapi(Angle,DKTSCFMATRIX(1,:));
fnplt(cs,1,'-b^');
hold on
cs1 = csapi(Angle,DKTSCFMATRIX(2,:));
fnplt(cs1,1,'-k^');
cs2 = csapi(Angle,DKTSCFMATRIX(3,:));
fnplt(cs2,1,'-r^');
  5 Comments
madhan ravi
madhan ravi on 27 Aug 2018
I have surfed through the internet what I found out was only line width can be changed for fnplt . There aren't much information about this function because it is not documented .

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Answers (1)

Amal George M
Amal George M on 30 Aug 2018
Edited: Amal George M on 30 Aug 2018
Hi Ulvi,
To my understanding, the intention is to modify the properties of markers created using ' fnplt '. As of now, the inbuilt function 'fnplt' does not have the functionality to achieve this. Thank you for bringing this to our attention.
As a workaround, you can modify the required properties using the handles to the graphic objects. I have attached the custom code below.
Angle = 0:45:360;
DKTSCFMATRIX=[1.60, 3.01, 3.50, 2.54, 4.01, 4.01, 3.61, 2.78, 1.60;
3.28, 3.06, 6.75, 7.34, 3.21, 5.05, 6.39, 4.64, 3.28;
1.16, 2.83, 5.24, 4.30, 2.92, 5.63, 6.55, 3.78, 1.16];
cs = csapi(Angle,DKTSCFMATRIX(1,:));
fnplt(cs,1,'-b^');
handle_axis=gca; % returns handle to current axis
handle_recent_line=handle_axis.Children(1); % returns handle to recent line
set(handle_recent_line,'MarkerFaceColor',handle_recent_line.Color,'MarkerSize',4) % assigns line color to marker face and changes marker size
hold on
cs1 = csapi(Angle,DKTSCFMATRIX(2,:));
fnplt(cs1,1,'-k^');
handle_recent_line=handle_axis.Children(1); % returns handle to recent line
set(handle_recent_line,'MarkerFaceColor',handle_recent_line.Color,'MarkerSize',4) % assigns line color to marker face and changes marker size
cs2 = csapi(Angle,DKTSCFMATRIX(3,:));
fnplt(cs2,1,'-r^');
handle_recent_line=handle_axis.Children(1); % returns handle to recent line
set(handle_recent_line,'MarkerFaceColor',handle_recent_line.Color,'MarkerSize',4) % assigns line color to marker face and changes marker size
ylabel('SCF','fontsize',11)
xlabel('Polar Angle','fontsize',11)
hleg1 = legend('Left Brace','Middle Brace','Right Brace');
grid on
xlim([0 360])
xticks([0:45:360])
title('Stress Concetration Factor Around DKT Joint Periphery')
Note: Here 'gca' function is used to get the current axis object. Here a link on the line properties that can be modified.
Hope this helps.

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