MPU-6050 accelerometer reading of one direction

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I am using these line of code to continuously read the real-time acceleration values from the IMU(MPU-6050):
a = arduino('COM5','Uno','Libraries',{'I2C','SPI'});
imu = mpu6050(a,'SampleRate',50,'SamplesPerRead',5,'ReadMode','Latest');
accelReadings = readAcceleration(imu);
It will returns one sample of the acceleration data on x, y, and z axes read from the sensor in units of m/s2 like this:
accelReadings =
-2.3399 -0.5377 3.0201
Is there any possible way for me to retrive only the value of the x axis (the first value only)? I tried to treat it as an array but it is not working.
Also, can I fuse the data (estimate the orientation, quaternion, determine roll, pitch and yaw angles) of this type of this 6DOF sensor(MPU6050) as there is no magnetometer?

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Gayatri Menon
Gayatri Menon 2020년 4월 21일
accelReadings(1) should give you the x values. If you have a license for Sensor Fusion and Tracking toolbox or Navigation toolbox, try using read() for more capabilities. For usage and examples, please refer link for read() .
If you have the above-mentioned licenses, you can use imufilter to determine orientation.'imufilter' uses only accelerometer and gyroscope values. Refer to the example here.
Hope this helps
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Gayatri Menon
Gayatri Menon 2020년 4월 23일
편집: Gayatri Menon 2020년 4월 24일
Please refer the below link.This link explains how the noise is calculated for MPU9250. A similar approach can be used for mpu6050 as well

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