I am trying to plot my spline with clamped conditions and I am not sure why it is not letting me plot

%% clamped boundary conditions -0.5 to 0.5

t = [160 180 195 225 250 280 300].';
y = [ 78.3 81.4 84.5 85.1 89.3 91.7 94.8].';

cs = spline(t,[-0.5 y 0.5]);
xx = linspace(160,300,50);
plot(t,y,'o',xx,ppval(cs,xx),'-');

Answer 1

[Joe Vinciguerra]

 %%clamped boundary conditions -0.5 to 0.5
t = [160 180 195 225 250 280 300];
y = [78.3 81.4 84.5 85.1 89.3 91.7 94.8];
cs = spline(t,[-0.5 y 0.5]);
xx = linspace(160,300,50);
plot(t,y,'o',xx,ppval(cs,xx),'-');

Answer 2

[Walter Roberson]

%% clamped boundary conditions -0.5 to 0.5
t = [160 180 195 225 250 280 300].';
y = [ 78.3 81.4 84.5 85.1 89.3 91.7 94.8].';
cs = spline(t,[-0.5; y; 0.5]);       %changed because y is column vector
xx = linspace(160,300,50);
plot(t,y,'o',xx,ppval(cs,xx),'-');