spss做因子分析时，发现矩阵有缺失值，导致最后的因子提取结果也有些缺失，请教了，怎么回事啊？？？

Component Matrixa

Component

1

2

3

.878

-.326

.809

-.400

.804

.520

.736

-.399

.168

.699

-.428

-.133

.684

.530

-.267

.439

.806

.557

.790

.644

.741

.586

-.682

.342

-.559

.649

-.152

.357

.723

.105

-.319

-.639

Extraction Method: Principal Component Analysis.

a. 3 components extracted.