Yes, you can access it directly as you would data props.
For example, the comboTwo computed property uses comboOne computed property as below,
data() {
return {
propOne: 'prop1',
propTwo: 'prop2'
}
},
computed: {
comboOne() {
return this.propOne + ',' + this.propTwo;
},
comboTwo() {
return this.comboOne.split(',').join('-');
}
}