我已经从A创建了一个矩阵dataset1，我希望稍后在dataset2中使用它。
如何以编程方式保存此矩阵并将其导入dataset2？
答案 0 :(得分：2)
请考虑以下玩具数据集：
a:visited {
color: red;
}
可以使用/* create dataset 1 */
clear
set obs 5
forvalues i = 1 / 5 {
generate norm`i' = rnormal(10, 20)
}
list
+----------------------------------------------------------+
| norm1 norm2 norm3 norm4 norm5 |
|----------------------------------------------------------|
1. | 29.184 47.57735 -6.06845 47.43953 12.10697 |
2. | 9.9639 65.09492 31.92023 18.47133 39.01292 |
3. | 20.88154 -2.251937 1.185946 22.67908 -11.98451 |
4. | 10.03257 13.94616 -10.22853 18.34467 37.34412 |
5. | 17.15362 42.20448 30.38455 -.5586708 20.34926 |
+----------------------------------------------------------+
save data1, replace
/* create dataset 2 */
clear
set obs 5
forvalues i = 1 / 5 {
generate unif`i' = runiform()
}
list
+------------------------------------------------------+
| unif1 unif2 unif3 unif4 unif5 |
|------------------------------------------------------|
1. | .4398566 .222692 .359981 .8840723 .840627 |
2. | .8955406 .7279246 .7385288 .1269085 .2610574 |
3. | .6760237 .5028067 .9236897 .2413106 .8938763 |
4. | .9666038 .0491344 .0098985 .4427792 .8565752 |
5. | .4118744 .368421 .1528643 .8636661 .0944128 |
+------------------------------------------------------+
save data2, replace
命令来做到这一点：
svmat请注意，如果尚未调用use data1, clear
mkmat norm*, matrix(A)
use data2, clear
matrix list A
A[5,5]
norm1 norm2 norm3 norm4 norm5
r1 29.184 47.577354 -6.0684505 47.439529 12.106971
r2 9.9638996 65.094917 31.920233 18.471329 39.01292
r3 20.88154 -2.2519367 1.1859455 22.679077 -11.984506
r4 10.032575 13.946158 -10.228531 18.344669 37.344124
r5 17.153618 42.204475 30.384546 -.55867082 20.349257
svmat A, names(norm)
list
+-----------------------------------------------------------------------------------------------------------------+
| unif1 unif2 unif3 unif4 unif5 norm1 norm2 norm3 norm4 norm5 |
|-----------------------------------------------------------------------------------------------------------------|
1. | .4398566 .222692 .359981 .8840723 .840627 29.184 47.57735 -6.06845 47.43953 12.10697 |
2. | .8955406 .7279246 .7385288 .1269085 .2610574 9.9639 65.09492 31.92023 18.47133 39.01292 |
3. | .6760237 .5028067 .9236897 .2413106 .8938763 20.88154 -2.251937 1.185946 22.67908 -11.98451 |
4. | .9666038 .0491344 .0098985 .4427792 .8565752 10.03257 13.94616 -10.22853 18.34467 37.34412 |
5. | .4118744 .368421 .1528643 .8636661 .0944128 17.15362 42.20448 30.38455 -.5586708 20.34926 |
+-----------------------------------------------------------------------------------------------------------------+
和/或clear matrix，则此解决方案将起作用。