܀ྛ
݈ଠ࿠ʢ(.0ϖύϘגࣜձࣾɺ๺཮ઌ୺Պֶٕज़େֶӃେֶʣ /FSWFT+1

/YΛ৮ͬͯΈΔճʢ೥݄೔ʣ NxͰMNISTͷखॻ͖਺ࣈը૾෼ྨΛࢼ͢ 

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݈ଠ࿠
BLB
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IUUQTLFOUBSPLVSJCBZBTIJDPN
ɾ(.0ϖύϘגࣜձࣾऔక໾$50
ɾҰൠࣾஂ๏ਓ೔ຊ$50ڠձཧࣄ
๺཮ઌ୺Պֶٕज़େֶӃେֶʢ+"*45ʣത ࢜લظ՝ఔࡏֶதͷࣾձਓֶੜͰ΋͋ Δɻ
*P5ؔ࿈ͷݚڀΛ४උ͍ͯ͠Δͱ͜Ζʢ ݄ʹ/FSWFT͕ग़ͯ͘Δݚڀใࠂ࿦จʹͭ ͍ͯൃද͠·͢ʣɻ ࣗݾ঺հ 2 

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IUUQTEBTICJUDPCMPHOYOVNFSJDBMFMJYJSJTOPXQVCMJDMZBWBJMBCMF 

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/Y

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IUUQTZPVUVCFG1,.N+Q"(8D 

ಈըΛ؍ͯΔ͚ͩͰ͸Θ͔Βͳ͍ͷͰ ϥΠϒίʔσΟϯάΛࣸܦͰ࠶ݱͨ͠ 

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/Y
IUUQTHJUIVCDPNLFOUBSPKOOOY 

͜Μͳײ͡ͰKeras෩ʹࢼͤ·͢ 
./*45σʔλͷಡΈࠐΈ
[x_train, y_train, x_test, y_test] = Jnnnx.MNIST.Dataset.load_data() 
σʔλͷ੔ܗͱਖ਼نԽ
x_train = x_train |> Nx.reshape({60000, 28*28}, names: [:batch, :input]) |> Nx.divide(255) x_test = x_test |> Nx.reshape({10000, 28*28}, names: [:batch, :input]) |> Nx.divide(255) 
POFIPUFODPEJOH
y_train = y_train |> Jnnnx.Utils.to_categorical(10, names: [:batch, :output]) y_test = y_test |> Jnnnx.Utils.to_categorical(10, names: [:batch, :output]) 
τϨʔχϯάσʔλΛ༻ֶ͍ͯश
params = Jnnnx.fit(x_train, y_train, epoch: 5, batch_size: 50, learning_rate: 0.01) 
ςετσʔλΛ༻͍ͯධՁ
score = Jnnnx.evaluate(params, x_test, y_test) IO.puts("Accuracy: #{Nx.to_scalar(score)}") 

ૉͷ&MJYJS

$16ʢ&9-"Λ༻͍ͳ͍ʣͰ࣮ߦͨ݁͠Ռ˞
ֶश݁ՌʢΤϙοΫ
5ɺֶश཰
0.01ɺֶशʹཁͨ࣌ؒ͠: ൒೔͙Β͍ʣ ˞
&9-"

$16΋ಈ͔ͯ͠Έ͕ͨɺܻ୆Ͱ଎͘ͳΔʢ࣍ϖʔδʣͱ͸͍͑ݩ͕஗ա͗ΔͷͰಉֶ͡शΛ΋͏Ұ౓΍Δ͜ͱ͸͠ͳ͔ͬͨɻ 

4PGUNBYؔ਺ͷ࣮ߦํࣜ͝ͱͷϕϯνϚʔΫ݁Ռ
IUUQTHJUIVCDPNFMJYJSOYOYUSFFNBJOOYOVNFSJDBMEFGJOJUJPOT 

˔ +PTÉͷϥΠϒίʔσΟϯάಈըΛ؍ͳ͕Βࣸܦͨ͠
˔ ػցֶशϥΠϒϥϦͷΑ͏ʹ࢖͑ΔΑ͏ʹ੔ཧͨ͠
˓ ࣸܦͨ͠ίʔυΛϥΠϒϥϦͬΆ͍ϑΝΠϧߏ଄Ͱ഑ஔ
˓ ϋΠύʔύϥϝλΛؔ਺ͷҾ਺ͱͯ͠౉ͤΔΑ͏ʹͨ͠
˔ ./*45ͷσʔληοτΛऔಘ͢ΔϞδϡʔϧΛ௥Ճͨ͠
˔ ֶशͨ͠ϞσϧΛɺςετσʔλʹΑͬͯධՁ͢Δؔ਺Λ௥Ճͨ͠
ˠ
ಈըͰσϞͯͨ͠ίʔυͷݩʹͳ͍ͬͯΔ΋ͷͱࢥΘΕΔ΋ͷ͕ FYMBͷ΄͏ͷFYBNQMFTʹ͋ͬͨʂ˞ ΍ͬͨ͜ͱ ˞
IUUQTHJUIVCDPNFMJYJSOYOYCMPCNBJOFYMBFYBNQMFTNOJTUFYT 

˔ ݱঢ়Ͱ͸ϨΠϠʔͷߏ੒ɺ׆ੑԽؔ਺ɺଛࣦؔ਺౳ΛܾΊଧͪʹ͠ ͍ͯΔ͕ɺࣗ༝ʹ૊Έ߹ΘͤΒΕΔΑ͏ʹ͢Δ͜ͱ
˓ ͦͷ͋ͨΓ·Ͱ΍Δͱ΋͏গ͠ϥΠϒϥϦͬΆ͘ͳΔ
˓ ͍·͸୯ʹॲཧΛͦΕͬΆ͘ݟ͑ΔΑ͏ʹ·ͱΊ͚ͨͩ
˔ &9-"Λ࢖ͬͯ(16Ͱܭࢉ͢Δ͜ͱ˞
·ͩ΍ͬͯͳ͍͜ͱ ˞
+FUTPO
/BOP
(#Ͱࢼ͔͕ͨͬͨ͠ɺϕλϕλ৮ͬͨΓ͍͔ͨͤ͠ىಈ͠ͳ͘ͳͬ 

͜Ε͔Βඞཁͳ΋ͷ͕੝Γͩ͘͞Μʂ
IUUQTZPVUVCFG1,.N+Q"(8D U 

˔ ݱঢ়͸ɺςϯιϧͷܭࢉ΍ࣗಈඍ෼౳ͷɺσΟʔϓϥʔχϯάΛ͢Δ ্ͰجຊͱͳΔϏϧσΟϯάϒϩοΫ͕Ͱ͖ͨͱ͜Ζ
˔ 5FOTPSGMPX,FSBTɺ1Z5PSDIɺTDJLJUMFBSOͷΑ͏ͳػցֶशϑϨʔ ϜϫʔΫ͕͋Δͱ͍͍ͳ͋
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ͦΜͳؾ࣋ͪ΋͋ͬͯࠓճɺࡶʹࢼͯ͠ΈͨΓͨ͠ͷͰͨ͠
ˠ
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⁠ʕϑϨʔϜϫʔΫฤʱΛಡΈͳ ͕Βࢼ͠ʹ࡞Γ࢝ΊͯΈ͚ͨͲ͏·͍͜ͱઃܭͰ͖ͳ͍ͯͬͨ͘Μ͋ ͖ΒΊ·ͨ͠ʢؔ਺ܕݴޠ೴ʹͳΓ͖Εͯͳ͍ʜʜʣ ࠓޙ΁ͷظ଴