While running the following code I am getting a error message "Undefined function 'updateAngle' for input arguments of type double "

Actually I was trying to do tehsame thing as given in the video "https://www.youtube.com/watch?v=MF-mqlG6quE" but in the getAngles function I am getting an error in the line marked with '#'it states that "Undefined function 'updateAngle' for input arguments of type double " function [angleX,angleY,angleZ] = getAngles(gyroConnection, gainx,gainy,gainz)
persistent previousRateX; persistent previousRateY; persistent previousRateZ; if(isempty(previousRateX)); previousRateX = 0; end if(isempty(previousRateY)); previousRateY = 0; end if(isempty(previousRateZ)); previousRateZ = 0; end
persistent previousAngleX; persistent previousAngleY; persistent previousAngleZ; if(isempty(previousAngleX)); previousAngleX = 0; end if(isempty(previousAngleY)); previousAngleY = 0; end if(isempty(previousAngleZ)); previousAngleZ = 0; end
persistent previousTime; if(isempty(previousTime)); previousTime = 0; tic; end
[rateX,rateY,rateZ] = readGyro(gyroConnection ,false); currentTime = toc;
newAngleX = calculateAngle(previousRateX, rateX, gainx);
###angleX = updateAngle(previousAngleX + newAngleX);
newAngleY = calculateAngle(previousRateY, rateY, gainy);
angleY = updateAngle(previousAngleY + newAngleY);
newAngleZ = calculateAngle(previousRateZ, rateZ, gainz);
angleZ = updateAngle(previousAngleZ + newAngleZ);
previousRateX = rateX; previousRateY = rateY; previousRateZ = rateZ; previousAngleX = angleX; previousAngleY = angleY; previousAngleZ = angleZ; previousTime = currentTime;
function[angle] = calculateAngle(previousRate, rate,gain)
angle = ((previousRate/2 + rate/2) * (currentTime - previousTime) * gain)/(100);
end function [angle] = update(angle) if(angle < 0) angle = angle + 360; else if(angle > 0) angle = angle - 360; end end end end
pls give me ur suggestions to overcome it. ASAP

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