Name legend on graph with a second y axis

I am plotting three curves on the same figure, but I have not been able to name the third legend because the third curve is plotted against a second y axis. In the following code is the graph and the things I've tried

T_4340_ASM =  [   205
    315
    425
    540
    650]

T_4340_ASM = 5×1

205 315 425 540 650

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S_u_4340_ASM = [ 1980
    1760
    1500
    1240
    1020]

S_u_4340_ASM = 5×1

1980 1760 1500 1240 1020

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S_y_4340_ASM = [ 1860
    1620
    1365
    1160
    860]

S_y_4340_ASM = 5×1

1860 1620 1365 1160 860

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El_4340_ASM = [ 11
    12
    14
    17
    20]

El_4340_ASM = 5×1

11 12 14 17 20

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HB_4340_ASM = [ 520
    490
    440
    360
    290]

HB_4340_ASM = 5×1

520 490 440 360 290

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figure(1)
plot(T_4340_ASM,S_y_4340_ASM,"Marker","square",Color=[0.6350 0.0780 0.1840])
hold on
plot(T_4340_ASM,S_u_4340_ASM,"Marker","pentagram","Color",[0 0.4470 0.7410])
hold on
title('Tempering temperature vs 4340 Steel Mechanical properties')
xlabel('Temperature[C°]')
ylabel('[MPa]')
legend('Yield Point','Tensile Strength') %If I put a third entry on here it ignores it because at this point the other curve is not plotted yet
yyaxis right
plot(T_4340_ASM,El_4340_ASM,"Marker","o") %And if i put it after here it just names the last legend
ylabel('Elongation [%]')

Answer 1

[Walter Roberson]

T_4340_ASM =  [   205
    315
    425
    540
    650]

T_4340_ASM = 5×1

205 315 425 540 650

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

S_u_4340_ASM = [ 1980
    1760
    1500
    1240
    1020]

S_u_4340_ASM = 5×1

1980 1760 1500 1240 1020

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

S_y_4340_ASM = [ 1860
    1620
    1365
    1160
    860]

S_y_4340_ASM = 5×1

1860 1620 1365 1160 860

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

El_4340_ASM = [ 11
    12
    14
    17
    20]

El_4340_ASM = 5×1

11 12 14 17 20

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

●

HB_4340_ASM = [ 520
    490
    440
    360
    290]

HB_4340_ASM = 5×1

520 490 440 360 290

<mw-icon class=""></mw-icon>

<mw-icon class=""></mw-icon>

figure(1)
h(1) = plot(T_4340_ASM,S_y_4340_ASM,"Marker","square",Color=[0.6350 0.0780 0.1840]);
hold on
h(2) = plot(T_4340_ASM,S_u_4340_ASM,"Marker","pentagram","Color",[0 0.4470 0.7410]);
hold on
title('Tempering temperature vs 4340 Steel Mechanical properties')
xlabel('Temperature[C°]')
ylabel('[MPa]')
legend('Yield Point','Tensile Strength') %If I put a third entry on here it ignores it because at this point the other curve is not plotted yet
yyaxis right
h(3) = plot(T_4340_ASM,El_4340_ASM,"Marker","o"); %And if i put it after here it just names the last legend
ylabel('Elongation [%]')

legend(h, {'S_y_4340_ASM', 'S_u_4340_ASM', 'El_4340_ASM'})

[Marol Valencia]

Thanks! How can I change the color of the right y axis keeping the curve yellow?

[Walter Roberson]

set(gca, 'YColor', 'k')  %black