# C1\_W2\_Lab01 small error/typo?

**URL:** <https://community.deeplearning.ai/t/c1-w2-lab01-small-error-typo/319490>\
**Category:** Supervised ML: Regression and Classification\
**Tags:** week-module-2\
**Created:** [April 30, 2023, 2:07pm UTC](https://community.deeplearning.ai/t/c1-w2-lab01-small-error-typo/319490 "2023-04-30T14:07:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Guillermo\_Gonzalez](https://avatars.discourse-cdn.com/v4/letter/g/e495f1/32.png) [@Guillermo\_Gonzalez](https://community.deeplearning.ai/u/Guillermo_Gonzalez)\
**Post date:** [April 30, 2023, 2:07pm UTC](https://community.deeplearning.ai/t/c1-w2-lab01-small-error-typo/319490/1 "2023-04-30T14:07:03Z")

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![C1_W2_Lab01](https://global.discourse-cdn.com/dlai/original/3X/1/8/18aab7e69b8088c63fa5c5f22b6b8fbe032a84a1.png)

On C1\_W2\_Lab01, section 4- Matrices , 4.1 Abstract , on the Matrix shown to the RIGHT (lecture), I think the second row , right-most element should be X2n instead of X1n.

Regards,  
G

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**Author:** ![AbdElRhaman\_Fakhry](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/abdelrhaman_fakhry/32/65768_2.png) [@AbdElRhaman\_Fakhry](https://community.deeplearning.ai/u/AbdElRhaman_Fakhry)\
**Post date:** [April 30, 2023, 5:55pm UTC](https://community.deeplearning.ai/t/c1-w2-lab01-small-error-typo/319490/2 "2023-04-30T17:55:49Z")

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Hi @Guillermo_Gonzalez  
Welcome to the community!

Do you mean this image

 ![image](https://global.discourse-cdn.com/dlai/original/3X/0/b/0b8253e7d5ced35b533b3085aded2a61ec35c26c.png)  
?

It’s correct as in the code it start from **Zero** base

Best Regards,  
Abderlahman

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**Author:** ![Guillermo\_Gonzalez](https://avatars.discourse-cdn.com/v4/letter/g/e495f1/32.png) [@Guillermo\_Gonzalez](https://community.deeplearning.ai/u/Guillermo_Gonzalez)\
**Post date:** [April 30, 2023, 6:14pm UTC](https://community.deeplearning.ai/t/c1-w2-lab01-small-error-typo/319490/3 "2023-04-30T18:14:28Z")

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Oh yeah my bad, I should have said that the example on the RIGHT has the issue …  
Because it’s the lecture example.

I still said I was referring to the (lecture) example.

Definitely on the (lecture) example there’s the issue I mentioned.  
Just corrected my original post.

Cheers to all.  
G