Table 5 CS-XGBoost model prediction results of different characteristics index statistics: Test set.

From: Multi-angle property analysis and stress–strain curve prediction of cementitious sand gravel based on triaxial test

Test set

y1

y2

y3

y4

y5

y6

y7

y8

y9

y10

y11

y12

y13

y14

y15

y16

y17

y18

R2

0.9305

0.9351

0.9423

0.9573

0.9443

0.9584

0.9640

0.9524

0.9560

0.9557

0.9565

0.9513

0.9471

0.9629

0.9515

0.9561

0.9545

0.9531

RMSE

277.7442

378.0496

324.2293

354.7321

431.2674

475.8576

429.6305

442.2685

430.9649

407.7955

377.6169

348.4335

345.9149

280.6147

316.0527

306.9779

287.6409

292.9544

MAE

223.8429

314.1321

274.2810

295.6529

346.5636

424.8335

371.5975

380.8595

378.7548

371.5438

325.8899

284.3746

284.1389

230.6240

273.3044

238.5586

225.2943

250.9486

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