3 9 Find Zero(s) Write a function that takes X and Y as input Assum

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3.9 Find Zero(s) Write a function that takes X and Y as

input. Assume that Y is a matrix of coefficients from a

system of equations and X is the value of each equation

(i.e. the other side of the equal sign). The coefficients in Y

correspond to decreasing powers of x from left to right (i.e.

the coefficient of x1 would be in the last column). The

function should find roots for each equation near -5, 0 and

5. Display the results to the command window, but make

sure that it is clear what is being displayed. You can

assume the function doesn’t have a power higher than x9 .

Solution

This general statement becomes more concrete when we

consider how the concept of SA has evolved from a simple

structural representation to a decision-centric viewpoint.3

In this perspective, NFRs serve as selection criteria for

choosing among myriad designs and implementations.4

For instance, we can justify choosing a layered

architectural style in terms of maintainability or portability,

or choosing a particular database technology in terms of

efficiency.

Software architects must continually deal with NFRs as

part of their SA design responsibility. They must know a

systemfs NFRs and how architectural decisions affect the

NFRsf fulfillment. Here, we present an empirical study that

uncovers relevant practices for software architects dealing

with NFRs during decision making. This study is based on

a two-part survey. First, we analyzed NFRs from an

engineering perspective, specifically in relation to three

requirements-engineering activities: elicitation,

documentation, and validation. Then, we investigated how

NFRs influence architectural decision making.

The Survey

We conducted semistructured interviews regarding a single

software development project in which the respondents

had participated as software architects. Compared to other

qualitative research strategies such as structured

questionnaires, semistructured interviews provide more

flexibility and let us better investigate interesting issues

that appear during conversations. Furthermore,

considering a single project instead of a general

perception of the architectsf rationale lets us better

interpret and assess contextual information.5

The Respondents and Their Organizations

The survey involved 13 respondents at 12 software-

intensive organizations covering a variety of business

areas and application domains (see Table 1). The

organizations comprised three types of business:

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3.9 Find Zero(s) Write a function that takes X and Y as input. Assume that Y is a matrix of coefficients from a system of equations and X is the value of each equation (i.e. the other side of the equal sign). The coefficients in Y correspond to decreasing powers of x from left to right (i.e. the coefficient of x1 would be in the last column). The function should find roots for each equation near -5, 0 and 5. Display the results to the command window, but make sure that it is clear what is being d isplayed. You can assume the function doesn’t have a power higher than x9 . Solution This general statement becomes more concrete when we consider how the concept of SA has evolved from a simple structural representation to a decision -centric viewpoint.3 In this perspective, NFRs serve as selection criteria for choosing among myriad designs and implementations.4 For instance, we can justify ...
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