How to add a trendline with ployfit

Question

Sean St Cyr 2020-11-13

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/646433-how-to-add-a-trendline-with-ployfit

回答： SaiDileep Kola 2020-11-16

I have the following code, and I am trying to put a trendline to the graph that it outputs, How would i do that with polyfit to this code?

if strcmp(choice,'Detail')
    
    [q,tf] = listdlg("PromptString",'Choose a material', "ListString", Information.Material); %prompts the list dialoug box
   if tf == 1
       x0 = (q*2)-1;
       y0 = q*2;
       for D = 1:1:length(q)
           plot(Data(x0(D),2:end),Data(y0(D),2:end),Information.Format{q(D)}) %plot data 
           grid on 
           hold on 
           lnd{L} = Information.Material{q(D)}; 
           L = L+1;
          
           
       end
            
            xlim([0 10]) %Sets x axis from 0-10
            ylim([0 100]) %Sets y axis from 0-100
            xlabel('Time (t) [min]'); %X-axis label
            ylabel('Temperature difference (T) [°C]'); %Y-axis label
            title('Detailed Plot of Selected Materials'); %Title of graph
   end   
   if tf == 0 
       error('PLEASE MAKE A SELECTION') % if there is no choice then produce the error
   end
end