error in ddensd solver

I have developed the code but it is showing some error. Kindly help.

clear all;
clc;
tf = 5;
t = linspace(0,tf,10);
hist = 1;
sol = ddesdNdd(@ddefunc, @dylp, @delays, hist, t)

Unrecognized function or variable 'ddesdNdd'.

tint = [0.0312 0.0938 0.1562 0.2188 0.2812 0.3438 0.4062 0.4688 0.5312 0.5938 0.6562 0.7188 0.7812 0.8438 0.9062 0.9688];
yint = deval(sol, tint)
%Sepayat filefor ddefunc
function yp = ddefunc(t, y, yL)
yp = y - (y*(yL)) + dyp;
end
%Separate file foe delays
function d = delays(t, x)
d =  sin(t);
end

%Separate file for NDDE
function dyp = delyp(t,y) 
dyp = t - sin(t);
end

Error: Failure at t=0 with derivative delay DELYP equal to T. DELYP can be equal to T only for

initial-value NDDEs at T=T0. In all other cases, DELYP must be less than T.

How to rectify this error?

[Vinayak]

Hi Rupal

The function “ddesdNdd” does not look like a standard function. Can you please share what the function does.