Hi$,$ this is my matrix multiplication program in scala i am trying to execute on data bricks,

$//$ Define small matrices M and N

val M $=$ Array$($Array$(1\mathrm{.}0,2\mathrm{.}0),$ Array$(3\mathrm{.}0,4\mathrm{.}0))$

val N $=$ Array$($Array$(5\mathrm{.}0,6\mathrm{.}0),$ Array$(7\mathrm{.}0,8\mathrm{.}0))$

$//$ Convert small matrices to RDDs

val MRDDSmall $=$ sc$.$parallelize$($M$.$zipWithIndex.flatMap $\{$

case $($row$,$ i$)=>$

row.zipWithIndex.map $\{$

case $($value$,$ j$)=>$

$(($i$.$toInt, j$.$toInt$),$ value$)$

$\}$

$\})$

val NRDDSmall $=$ sc$.$parallelize$($N$.$zipWithIndex.flatMap $\{$

case $($row$,$ i$)=>$

row.zipWithIndex.map $\{$

case $($value$,$ j$)=>$

$(($i$.$toInt, j$.$toInt$),$ value$)$

$\}$

$\})$

$//$ Function to perform matrix multiplication of RDDs

def COOMatrixMultiply$($M: RDD$[(($Int$,$ Int$),$ Double$)],$ N: RDD$[(($Int$,$ Int$),$ Double$)])$: RDD$[(($Int$,$ Int$),$ Double$)]=\{$

val MJoined $=$ M$.$map $\{$

case $(($i$,$ k$),$ value$)=>($k$,($i$,$ value$))$

$\}$

val NJoined $=$ N$.$map $\{$

case $(($k$,$ j$),$ value$)=>($k$,($j$,$ value$))$

$\}$

MJoined.join$($NJoined$).$map $\{$

case $(\_,(($i$,$ Mvalue$),(\_,$ Nvalue$)))=>(($i$,$ j$),$ Mvalue $*$ Nvalue$)$

$\}.$reduceByKey$(\_+\_)$

$\}$

$//$ Perform matrix multiplication

val R$\_$RDD$\_$Small $=$ COOMatrixMultiply$($MRDDSmall$,$ NRDDSmall$)$

$//$ Print the result

R$\_$RDD$\_$Small.collect$().$foreach$($println$)$

but this is the errors i am facing:

command$-1035103480973730$:$9$: error: not found: value Mvalue

case $(\_,(($i$,$ Mvalue$),(\_,$ Nvalue$)))=>(($i$,$ j$),$ Mvalue $*$ Nvalue$)$

$^$

command$-1035103480973730$:$9$: error: not found: value Nvalue

case $(\_,(($i$,$ Mvalue$),(\_,$ Nvalue$)))=>(($i$,$ j$),$ Mvalue $*$ Nvalue$)$

$^$

command$-1035103480973730$:$9$: error: not found: value j

case $(\_,(($i$,$ Mvalue$),(\_,$ Nvalue$)))=>(($i$,$ j$),$ Mvalue $*$ Nvalue$)$

$^$

command$-1035103480973730$:$9$: error: not found: value Mvalue

case $(\_,(($i$,$ Mvalue$),(\_,$ Nvalue$)))=>(($i$,$ j$),$ Mvalue $*$ Nvalue$)$

$^$

command$-1035103480973730$:$9$: error: not found: value Nvalue

case $(\_,(($i$,$ Mvalue$),(\_,$ Nvalue$)))=>(($i$,$ j$),$ Mvalue $*$ Nvalue$)$

can you please help me fix this so that the code runs on data bricks. I am not able to run this on data bricks. i have very little knowledge in scala and would like to have help.

Thank you so much