MATLAB: Avoid lower case in legend by plotting legend with ‘DisplayName’

plotundercase

Hello,

I have again a similar Problem, but in this case I can't separate legend, and : 'Interpreter','none' is here also not working. How can I print names like 001_M1_Distance_0.5m_AKG_C1000S_F1_MS1 without undercases?

label1 = extractBefore({i(j).name}, ".mat");
            label1 = extractAfter(label1, "_");
            ...........
if any(M1)
    
    plot(M1(:,2),M1(:,1),'-o','DisplayName',label1{1});
    hold on
end 
if any(M2)
    
    plot(M2(:,2),M2(:,1),'-o','DisplayName',label2{1});
    hold on
end
if any(M3)
    plot(M3(:,2),M3(:,1),'-o','DisplayName',label3{1});
    hold on
end
if any(M4)
    plot(M4(:,2),M4(:,1),'-o','DisplayName',label4{1});
    hold on
end

Thanks!

Best Answer

Use the 'Interpreter', 'none' option in legend():

% Read headers
plot(1:10);
hold on
plot(4:14);
legend('plot_1', 'plot_2', 'Interpreter', 'none', 'Location', 'Northwest');

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MATLAB: Plot multiple legend in a loop with variable

I suggest you apply this 2-step approach to your code.

Step 1: Use the DisplayName property of graphics objects to define the legend strings.

Step 2: Use the graphics object handles to specify what is included in the legend.

This example below shows the structure of these two steps.

cla()               % clear axes
hold on
n = 6; 
h = gobjects(n,3);  % used to store the graphics handles
labels = {'aaa' 'bbb' 'ccc' 'ddd' 'eee' 'fff'};
colors = lines(n); 
for j = 1:3
    for i = 1:n
        % STEP 1: use DisplayName
        h(i,j) = plot(1:5, rand(1,5)+i-1, '-o', 'Color', colors(i,:), 'DisplayName', labels{i})
    end
end
% STEP 2: Specify which handles are included. 
legend(h(:,1));  % Only include the 1st column of handles

MATLAB: How to plot two line in one figure

Hi,

If you want the plots for different values of XNP to appear on the same graph, instead of using figure, number your figures as figure(1) and figure(2). You were correct when you were using hold on and hold off. By numbering your figure, when you change the value of XNP to 5 from 4, the new line will be overlap the plot generated when XNP = 4. Make sure that you do not close the plots generated when XNP = 4. A better method would be to modify your code so that XNP is a vector of values.

I have pasted the modified code below. Look at the comments at the bottom of the code to see the changes.

n = 0;
VM = 881;
VT = 600;
XNT = 1;
HEDEG = -20;
XNP = 5;
RM1 = 0;
RM2 = 0;
RT1 = 40000;
RT2 = 10000;
BETA = 0.85;
VT1 = -VT*cos(BETA);
VT2 = VT*sin(BETA);
HE = HEDEG/57.3;
T = 0;
S = 0;
RTM1 = RT1 - RM1;
RTM2 = RT2 - RM2;
RTM = sqrt(RTM1*RTM1+RTM2*RTM2);
XLAM = atan2(RTM2,RTM1);
XLEAD = asin(VT*sin(BETA+XLAM)/VM);
THET = XLAM + XLEAD ;
VM1 = VM*cos(THET+HE);
VM2 = VM*sin(THET+HE);
VTM1 = VT1 - VM1;
VTM2 = VT2 - VM2;
VC = -(RTM1*VTM1+RTM2*VTM2)/RTM;
while VC >= 0
  if RTM < 1000
      H = 0.0002;
  else 
      H = 0.01;
  end
  BETAOLD = BETA;
  RT1OLD = RT1;
  RT2OLD =RT2;
  RM1OLD = RM1;
  RM2OLD = RM2;
  VM1OLD = VM1;
  VM2OLD = VM2;
  STEP = 1;
  FLAG = 0;
  while STEP <= 1
      if FLAG == 1
                STEP = 2;
         BETA = BETA+H*BETAD;
         RT1 = RT1 +H*VT1;
         RT2 = RT2 +H*VT2;
         RM1 = RM1 +H*VM1;
         RM2 = RM2 +H*VM2;
         VM1 = VM1 +H*AM1;
         VM2 = VM2 +H*AM2;
         T=T+H;
      end
      RTM1=RT1-RM1;
          RTM2=RT2-RM2;
          RTM=sqrt(RTM1*RTM1+RTM2*RTM2);
          VTM1=VT1-VM1;
          VTM2=VT2-VM2;
          VC=-(RTM1*VTM1+RTM2*VTM2)/RTM;
          XLAM=atan2(RTM2,RTM1);
          XLAMD=(RTM1*VTM2-RTM2*VTM1)/(RTM*RTM);
          XNC=XNP*VC*XLAMD;
          AM1=-XNC*sin(XLAM);
          AM2=XNC*cos(XLAM);
          VT1=-VT*cos(BETA);
          VT2=VT*sin(BETA);
          BETAD=XNT/VT;
      FLAG=1;
  end
  FLAG=0;
  BETA=.5*(BETAOLD+BETA+H*BETAD);
  RT1=.5*(RT1OLD+RT1+H*VT1);
  RT2=.5*(RT2OLD+RT2+H*VT2);
  RM1=.5*(RM1OLD+RM1+H*VM1);
  RM2=.5*(RM2OLD+RM2+H*VM2);
  VM1=.5*(VM1OLD+VM1+H*AM1);
  VM2=.5*(VM2OLD+VM2+H*AM2);
  S=S+H;
  if S >=.09999
          S=0.;
      n=n+1;
      ArrayT(n)=T;
      ArrayRT1(n)=RT1;
      ArrayRT2(n)=RT2;
      ArrayRM1(n)=RM1;
      ArrayRM2(n)=RM2;
      ArrayXNCG(n)=XNC/32.2;
      ArrayRTM(n)=RTM;
  end
end
RTM
hold on % Added to plot multiple lines
figure(1); % Number your figure

plot(ArrayRT1,ArrayRT2,ArrayRM1,ArrayRM2),grid ON % It is better to use grid ON
title('Two-dimensional tactical missile-target engagement simulation')
xlabel('Downrange (Ft) ')
ylabel('Altitude (Ft)')
hold off
hold on
figure(2); % Number your figure
plot(ArrayT,ArrayXNCG),grid ON
title('Two-dimensional tactical missile-target engagement simulation')
xlabel('Time (sec)')
ylabel('Acceleration of missle (G)')
hold off
clc
output=[ArrayT',ArrayRT1',ArrayRT2',ArrayRM1',ArrayRM2',ArrayXNCG',ArrayRTM' ];
save datfil.txt output
disp '*** Simulation Complete'

Best Answer

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