Trying to pause the code until my button is pressed and will continue the code

I want my code to not run until I press a button on my curcuit which will cause DigitalPin('D4') to be 0 and then I want it to run my code.

clear all

clear

clc

a = arduino('com3', 'uno');

s = servo(a, 'D10','MaxPulseDuration', .0025, 'MinPulseDuration', .0005);

readDigitalPin(a,'D2')

n = 200;

x = zeros(1,n);

for k = 1:n;

z = readVoltage(a,'A5');

p = ((1023 / 5) * z);

x(k) = (p / 1023);

writePosition(s,x(k));

end

for k = 1:n

writePosition(s,x(k))

end

Answer 1

[Ridwan Alam]

You can use a while loop to wait:

while(readDigitalPin(a,'D4')!=0)
    % wait here
end