How to combine plots on subplot?

I need to plot 3 different plots with 4 different datas, however these plots must be subplot. But I cannot hold on them on correct places. What should I do?

black1=[7.0 10.3 14.0 15.4];
white1=[6.8 9.8 12.6 15.1];
pol1=[0.3 0.6 .9 1.1];
alu1=[2.4 3.2 3.7 4.4];
temp1=[83 102 122 133];

black2=[8.4 10.8 17 17.1];
white2=[8 10.7 16.6 16.7];
pol2=[.8 1.6 1.8 1.9];
alu2=[3 3.9 5.5 5.8];
temp2=[90 105.5 134.5 136];

black3=[8 10.8 14.8 14];
white3=[7.8 10.4 14.5 13.5];
pol3=[1.2 1.3 2 0.9];
alu3=[3 3.7 5.2 4.4];
temp3=[89 104 128 135];




xlabel('Temperature as Celcius')
ylabel('Sensor Readings as mV')
hold on
plot(temp1,black1,'ko-'),subplot(3,1,1),hold on
plot(temp1,white1,'go-'),subplot(3,1,1),hold on
plot(temp1,pol1,'bo-'),subplot(3,1,1),hold on
plot(temp1,alu1,'ro-'),subplot(3,1,1),hold on



plot(temp2,black2,'kx--'),subplot(3,1,2),hold on
plot(temp2,white2,'gx--'),subplot(3,1,2),hold on
plot(temp2,pol2,'bx--'),subplot(3,1,2),hold on
plot(temp2,alu2,'rx--'),subplot(3,1,2),hold on



plot(temp3,black3,'k.-'),subplot(3,1,3),hold on
plot(temp3,white3,'g.-'),subplot(3,1,3),hold on
plot(temp3,pol3,'b.-'),subplot(3,1,3),hold on
plot(temp3,alu3,'r.-'),subplot(3,1,3)

Answer 1

[G A]

figure(1)
clf

subplot(3,1,1)
hold on
plot(temp1,black1,'ko-'),
plot(temp1,white1,'go-'),
plot(temp1,pol1,'bo-'),
plot(temp1,alu1,'ro-'),

subplot(3,1,2)
hold on
plot(temp2,black2,'kx--'),
plot(temp2,white2,'gx--'),
plot(temp2,pol2,'bx--'),
plot(temp2,alu2,'rx--'),
ylabel('Sensor Readings as mV')

subplot(3,1,3)
hold on
plot(temp3,black3,'k.-'),
plot(temp3,white3,'g.-'),
plot(temp3,pol3,'b.-'),
plot(temp3,alu3,'r.-'),
xlabel('Temperature as Celcius')