Lab 4 - Knitting Error at Step 4

[voznyuky]

@AntJam-Howell

I am getting this error message when I attempt to knit:

Error in (function (cond) :
error in evaluating the argument 'x' in selecting a method for function 'addAttrToGeom': subscript out of bounds
Calls: ... -> as_Spatial -> .as_Spatial ->
Execution halted

It starts at step 4 with this code:

msp.sp <- as_Spatial( msp )

class( msp.sp )

[voznyuky]

I noticed that I was not seeing rows when I tried head(msp) and found my error, was able to fix it.

[AntJam-Howell]

Great. Glad you were able to figure it out. Best

…

-- Anthony Howell Director, Center for Technology, Data, and Society, Associate Professor, Public Policy Arizona State University

On Mon, Apr 1, 2024 at 12:19 PM voznyuky ***@***.***> wrote: I noticed that I was not seeing rows when I tried head(msp) and found my error, was able to fix it. — Reply to this email directly, view it on GitHub <https://urldefense.com/v3/__https://github.com/DS4PS/cpp-529-spr-2021/issues/30*issuecomment-2030391536__;Iw!!IKRxdwAv5BmarQ!fsyzazKQscuHJ5BbZ9F8dIr1sfcYhDcIN1YCG48ppqvEZcRF1Yv3pkBmxQRANk02GM2IUTXmI8m8STFydCH8kgkb585JgA$>, or unsubscribe <https://urldefense.com/v3/__https://github.com/notifications/unsubscribe-auth/AMK2Y75WSYEPRNCXL7ZWY5LY3GXK7AVCNFSM6AAAAABFRCNNDKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMZQGM4TCNJTGY__;!!IKRxdwAv5BmarQ!fsyzazKQscuHJ5BbZ9F8dIr1sfcYhDcIN1YCG48ppqvEZcRF1Yv3pkBmxQRANk02GM2IUTXmI8m8STFydCH8kgnzo_I-OA$> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[KaytieS]

@voznyuky I got this same error, what did you need to do to fix it?

[voznyuky]

@KaytieS try this:

# can merge an sf object and data.frame
msp.pop$GEOID<-sub('.', '', msp.pop$GEOID) (I was missing this)
msp <- merge( msp.pop, census.dat, by.x="GEOID", by.y="tractid" )

# make sure there are no empty polygons
msp <- msp[ ! st_is_empty( msp ) , ]

head(msp)

[KaytieS]

@voznyuky this worked! Thank you so much!

[voznyuky]

Glad to hear it helped!