Add correlation coefficient (r) and r^2 to plot

I am having difficulty adding my value of correlation coefficient and r^2 to my scatter plot. I am able to create a scatter plot and add trendline to the plot as well as the trendline equation. I would like to have the correlation coefficient (r ) and r^2 underneath the trendline equation (see scatterplot figure). I can't seem to figure this part out. Attached is my scatterplot (jpeg) and data (csv).

T=csvread('merged_hrrr_camera_arm_DJF2018_19.csv',1,1);
x=T(:,2); % hrrr data
y=T(:,9); % camera data

scatter(x,y) %scatter plot hrrr vs camera
title('DJF 2018-19 HRRR f00 vs Camera')
xlabel('HRRR')
ylabel('Camera')

c=polyfit(x,y,1); %fit trendline
disp([' y = ' num2str(c(1)) '*x + ' num2str(c(2))]);

R =corrcoef(x,y);
r=['',num2str(R(1,2))]
R2 = R(2)^2;
r2=['',num2str(R2)]

eq = sprintf('y = %.3f x + %.3f', c(1), c(2));
text(70, 70, eq)

y_est=polyval(c,x); %evaluate fit equation using polyval

hold on
plot(x,y_est)
hold off

Answer 1

[Star Strider]

I would just use another text object. Alternatively, you can add those to ‘eq’ easily enough.

Try this:

eq = sprintf('y = %.3f x + %.3f \n R = %.3f \n R^2 = %.3f', c(1), c(2), R, R2);

.