I want to plot multiple line graph but I want two to be on a log x scale and two to be on the normal x scale. Please help.

Here is my code:

x = 1:999999:1000000; y = [2.079E+06,2.079E+06];

Quad8_x=[6001
16501
24001
29349
];
Tria6_x=[12001
33001
48001
58697
];
Inventor_x=[708
8723
42375
598818
];

Quad8_y=[6.735E+05
8.060E+05
8.474E+05
8.665E+05
];
Tria6_y=[6.754E+05
8.088E+05
8.505E+05
8.699E+05
];
Inventor_y=[9.874E+05
1.041E+06
1.213E+06
1.735E+06
];

figure
semilogx(x,y,':k'); 
hold on
plot(Quad8_x,Quad8_y,'k-o'); %this needs to be on normal scale
hold on
plot(Tria6_x,Tria6_y,'b-.*');%this needs to be on normal scale
hold on
semilogx(Inventor_x,Inventor_y, 'r--x');
hold off

xlabel('Log of no. of elements','FontSize',14)
ylabel('Maximum Stress [Pa]','FontSize',14)

legend('Analytical Solution','Quad8','Tria6','Inventor','Location','southwest')