R图显示

Question

我是R的初学者 如何在R中显示相同的图表以及他们称之为什么？

Answer 1

我认为这可能对你有用。

JNIEXPORT jint JNICALL Java_demo_JNIWrapper_pax_1store_1get_1data_1avail_1info
  (JNIEnv *env, jclass jclass1, jobjectArray jobj){

jclass dataClass=(*env)->FindClass(env,"demo/DataAvailable");//Get the java class 

for(i=0;i< 2;i++)
    {
                jobject j=(*env)->GetObjectArrayElement(env,jobj,i);
jmethodID meth=(*env)->GetMethodID(env,dataClass,"setTimeStamp","(Ljava/lang/String;)V");//this gets the method id present in the class 


               if(meth==NULL){
                printf("Method set is null");
                }

jstring x =  (*env)->NewStringUTF(env,"2013-12");
        (*env)->CallObjectMethod(env,j,meth,x);//This is where I get Null Pointer

}

 (*env)->DeleteLocalRef(env, dataClass);

return 0;

}