小编jr1*_*321的帖子

在一个项目中，我设计了一个八度音阶 K-means 算法的原型。如果无法在 HTML 文件中运行 Octave，我将如何将这个以八度编写的 K-means 算法转换为 Tensorflow.js，以便我能够在浏览器中运行它。：

x = [1,2,3,4,5,6;7,8,9,10,11,12;13,14,15,16,17,18]
time = [1,2,3,4,5,6]

k = size(x)
foo = 0
mu = zeros(k(1),1)

for i = 1:k(2),
  mu = [x(:,i)/pinv(time(i)), mu]
  foo = foo+1
endfor
mu(:,[foo+1]) = [];
usr = sum(mu') / numel(x)
usr = usr'


x = [x,usr]



centroids = [x(:,randi([1,size(x)(2)])), x(:,randi([1,size(x)(2)]))]


if centroids(:,1) == centroids(:,2),
  for i = 1:500,
    centroids = [x(:,randi([1,size(x)(2)])), x(:,randi([1,size(x)(2)]))]
  endfor
endif


K = size(centroids, 2);

idx = zeros(size(x,1), 1);


for c = 1:500, …

我有一个大小为 [299,13] 的数据集（包含数据和标签），并且模型不断输出/预测相同的值。这是一个二元分类任务。我如何让我的模型预测不总是相同的值？

这是代码（带有一些虚拟数据）：

//X is the data and y is the label

    
   var Dataset = tf.tensor([[1,0.491821360184978,9,314,0.504585169147173,542,1231,3213,1,0.267304071302649,3,0.615917680092409,0],
        [0,0.72959029133292,3,758,0.402582737085955,400,1788,4599,0,0.532702887951197,4,0.18630897965037,1],
        [1,0.198764110760428,5,787,0.65507860022684,887,192,4831,1,0.739456077544426,3,0.100068056951143,1],
        [0,0.583574833590476,5,596,0.933996451580092,631,331,811,0,0.258445986493932,7,0.811276729811182,0],
        [1,0.701499878184206,8,854,0.0326334179806069,845,470,4930,1,0.825469683527519,1,0.448086959665654,1],
        [0,0.954482878414911,2,468,0.736300149681564,557,3110,739,0,0.325783042694677,5,0.43488580142501,1],
        [1,0.384845877769,2,662,0.265402742189238,649,384,1158,1,0.484884260891815,2,0.915444292219105,0],
        [1,0.379266474923531,9,551,0.275982850450116,1022,3329,1413,1,0.237295089390298,4,0.817104709627837,1],
        [1,0.691365367558705,8,549,0.479627221800976,796,3381,495,1,0.37129382411555,9,0.332832739155564,1],
        [0,0.433042848178662,5,529,0.545178403950882,842,4768,506,0,0.386370525896832,9,0.189942077251933,0],
        [1,0.611272282663452,4,823,0.737901576655264,839,2724,1787,1,0.365032317656007,6,0.884073622694046,0],
        [0,0.0084315409129881,5,352,0.76858549557176,476,685,4796,0,0.302944943656102,1,0.849655932794213,1],
        [0,0.977380232874908,6,701,0.588833228576897,999,2897,3325,0,0.418024491281536,2,0.631872118440871,1],
        [1,0.419601058571829,10,384,0.0157052616592944,1009,4438,113,1,0.909015627566542,1,0.0297684897733232,0],
        [0,0.739471449044276,4,836,0.0430176780439737,1030,1456,3932,0,0.331426481315121,6,0.734008754824423,0],
        [1,0.00209807072438295,4,352,0.499622407429238,418,1912,4452,1,0.727130871883893,8,0.157427964683612,0],
        [1,0.956533819923862,10,681,0.196708599930969,829,4562,1718,1,0.233193195569506,7,0.60582783922237,0],
        [1,0.504637155233183,8,809,0.608861975627751,717,130,4194,1,0.134197560919101,6,0.375188428842507,0],
        [0,0.747363884375055,1,522,0.868234577182028,849,3529,1192,0,0.0322641640468155,5,0.185973206518818,0],
        [0,0.244142898027225,10,402,0.0280582030746698,315,3576,3882,0,0.724916254371562,8,0.062229775169706,1],
        [0,0.858414851618448,8,459,0.367325906336267,616,930,3892,0,0.177388425930446,10,0.859824526007041,1],
        [1,0.921555604905976,2,863,0.821166873626313,528,1624,1289,1,0.366243396916411,5,0.453840754701258,1],
        [1,0.171321120311715,1,524,0.177251413832862,468,1608,3123,1,0.192861821442111,8,0.122983286410146,0],
        [0,0.539946042901786,6,692,0.817780349862711,392,1053,4891,0,0.409578972921785,3,0.0453862502541893,1],
        [1,0.996848843212564,5,549,0.877740438211017,762,3046,843,1,0.888578696082088,8,0.877971306478434,1],
        [0,0.218116987741582,3,655,0.240496962520226,407,1001,1474,0,0.976212355833712,2,0.936396547703282,1]])
    function onBatchEnd(batch, logs) {
        console.log('Accuracy', logs.acc);
    }
    
    var x = Dataset.slice([0, 0], [-1, 12])
    const y = Dataset.slice([0, 12], [-1, 1])
    
    const model = tf.sequential({
        layers: [
            tf.layers.dense({ inputShape: [12], units: 12, activation: "sigmoid" }),
            tf.layers.dense({ units: 8, …

我有 2 个数据框 Dataframe1：

id date1
1 11-04-2022
1 03-02-2011
2 03-05-2222
3 01-01-2001
4 02-02-2012

和数据框2：

id date2 data data2
1 11-02-2222 1 3
1 11-02-1999 3 4
1 11-03-2022 4 5
2 22-03-4444 5 6
2 22-02-2020 7 8
...

我想做的是从 Dataframe2 中获取与 Dataframe1 中的 date1 最接近日期的行，但它必须适合 id，但日期必须在 date1 之前。所需的输出如下所示：

id date1 date2 data data2
1 11-04-2022 11-03-2022 4 5
1 03-02-2011 11-02-1999 3 4
2 03-05-2222 22-02-2020 7 8

我将如何使用熊猫来做到这一点？